121012213110 has 128 divisors (see below), whose sum is σ = 306824094720. Its totient is φ = 30485030400.

The previous prime is 121012213067. The next prime is 121012213171. The reversal of 121012213110 is 11312210121.

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 121012213110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24892080 + ... + 24896940.

It is an arithmetic number, because the mean of its divisors is an integer number (2397063240).

Almost surely, 2^121012213110 is an apocalyptic number.

121012213110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121012213110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153412047360).

121012213110 is an abundant number, since it is smaller than the sum of its proper divisors (185811881610).

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

121012213110 is a wasteful number, since it uses less digits than its factorization.

121012213110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5334.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121012213110 its reverse (11312210121), we get a palindrome (132324423231).

The spelling of 121012213110 in words is "one hundred twenty-one billion, twelve million, two hundred thirteen thousand, one hundred ten".