1212122101120 has 128 divisors (see below), whose sum is σ = 3313942007040. Its totient is φ = 415302211584.

The previous prime is 1212122100941. The next prime is 1212122101123. The reversal of 1212122101120 is 211012212121.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1212122101094 and 1212122101103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212122101123) 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 15 ways as a sum of consecutive naturals, for example, 6552619 + ... + 6735061.

It is an arithmetic number, because the mean of its divisors is an integer number (25890171930).

Almost surely, 2^{1212122101120} is an apocalyptic number.

1212122101120 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 1212122101120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1656971003520).

1212122101120 is an abundant number, since it is smaller than the sum of its proper divisors (2101819905920).

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

1212122101120 is a wasteful number, since it uses less digits than its factorization.

1212122101120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183952 (or 183940 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212122101120 its reverse (211012212121), we get a palindrome (1423134313241).

The spelling of 1212122101120 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred one thousand, one hundred twenty".