121422821904 has 100 divisors (see below), whose sum is σ = 357194301420. Its totient is φ = 39810735360.

The previous prime is 121422821837. The next prime is 121422821909. The reversal of 121422821904 is 409128224121.

121422821904 is a `hidden beast` number, since 1 + 214 + 228 + 219 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34279781904 + 87143040000 = 185148^2 + 295200^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121422821909) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 688899 + ... + 847010.

Almost surely, 2^121422821904 is an apocalyptic number.

It is an amenable number.

121422821904 is an abundant number, since it is smaller than the sum of its proper divisors (235771479516).

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

121422821904 is a wasteful number, since it uses less digits than its factorization.

121422821904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535990 (or 1535975 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 121422821904 in words is "one hundred twenty-one billion, four hundred twenty-two million, eight hundred twenty-one thousand, nine hundred four".