121222021980 has 96 divisors (see below), whose sum is σ = 357365756160. Its totient is φ = 30617671680.

The previous prime is 121222021871. The next prime is 121222021981. The reversal of 121222021980 is 89120222121.

It is a super-2 number, since 2×121222021980² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222021981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6816300 + ... + 6834060.

It is an arithmetic number, because the mean of its divisors is an integer number (3722559960).

Almost surely, 2^121222021980 is an apocalyptic number.

121222021980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222021980 is an abundant number, since it is smaller than the sum of its proper divisors (236143734180).

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

121222021980 is a wasteful number, since it uses less digits than its factorization.

121222021980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23779 (or 23777 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 121222021980 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, nine hundred eighty".