121020912 has 80 divisors (see below), whose sum is σ = 348702880. Its totient is φ = 40186368.

The previous prime is 121020901. The next prime is 121020919. The reversal of 121020912 is 219020121.

It is a super-2 number, since 2×121020912² = 29292122282623488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020919) 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, 197118 + ... + 197730.

It is an arithmetic number, because the mean of its divisors is an integer number (4358786).

Almost surely, 2^121020912 is an apocalyptic number.

121020912 is a gapful number since it is divisible by the number (12) 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 121020912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174351440).

121020912 is an abundant number, since it is smaller than the sum of its proper divisors (227681968).

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

121020912 is a wasteful number, since it uses less digits than its factorization.

121020912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087 (or 1075 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 121020912 is about 11000.9505043882. The cubic root of 121020912 is about 494.6372365074.

It can be divided in two parts, 1210 and 20912, that added together give a palindrome (22122).

The spelling of 121020912 in words is "one hundred twenty-one million, twenty thousand, nine hundred twelve".