121210112120 has 64 divisors (see below), whose sum is σ = 280091714400. Its totient is φ = 47190284800.

The previous prime is 121210112087. The next prime is 121210112123. The reversal of 121210112120 is 21211012121.

It is a junction number, because it is equal to n+sod(n) for n = 121210112095 and 121210112104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210112123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15899 + ... + 492618.

Almost surely, 2^121210112120 is an apocalyptic number.

121210112120 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 121210112120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140045857200).

121210112120 is an abundant number, since it is smaller than the sum of its proper divisors (158881602280).

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

121210112120 is a wasteful number, since it uses less digits than its factorization.

121210112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508688 (or 508684 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121210112120 its reverse (21211012121), we get a palindrome (142421124241).

Subtracting from 121210112120 its reverse (21211012121), we obtain a palindrome (99999099999).

It can be divided in two parts, 1212101 and 12120, that added together give a palindrome (1224221).

The spelling of 121210112120 in words is "one hundred twenty-one billion, two hundred ten million, one hundred twelve thousand, one hundred twenty".