121112212020 has 24 divisors (see below), whose sum is σ = 339114193824. Its totient is φ = 32296589856.

The previous prime is 121112211973. The next prime is 121112212021. The reversal of 121112212020 is 20212211121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112212021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009268374 + ... + 1009268493.

It is an arithmetic number, because the mean of its divisors is an integer number (14129758076).

Almost surely, 2^121112212020 is an apocalyptic number.

121112212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112212020 is an abundant number, since it is smaller than the sum of its proper divisors (218001981804).

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

121112212020 is a wasteful number, since it uses less digits than its factorization.

121112212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018536879 (or 2018536877 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121112212020 its reverse (20212211121), we get a palindrome (141324423141).

The spelling of 121112212020 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, twenty".