121230101220 has 96 divisors (see below), whose sum is σ = 342787648896. Its totient is φ = 32010700800.

The previous prime is 121230101219. The next prime is 121230101221. The reversal of 121230101220 is 22101032121.

It is an interprime number because it is at equal distance from previous prime (121230101219) and next prime (121230101221).

It is a super-2 number, since 2×121230101220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121230101220.

It is not an unprimeable number, because it can be changed into a prime (121230101221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3606732 + ... + 3640188.

It is an arithmetic number, because the mean of its divisors is an integer number (3570704676).

Almost surely, 2^121230101220 is an apocalyptic number.

121230101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121230101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171393824448).

121230101220 is an abundant number, since it is smaller than the sum of its proper divisors (221557547676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121230101220 is a wasteful number, since it uses less digits than its factorization.

121230101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34061 (or 34059 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121230101220 its reverse (22101032121), we get a palindrome (143331133341).

The spelling of 121230101220 in words is "one hundred twenty-one billion, two hundred thirty million, one hundred one thousand, two hundred twenty".