121049575920 has 1440 divisors, whose sum is σ = 542377285632. Its totient is φ = 23627096064.

The previous prime is 121049575919. The next prime is 121049575949. The reversal of 121049575920 is 29575940121.

121049575920 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 4 + 9 + 57 + 592 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 724847677 + ... + 724847843.

Almost surely, 2^121049575920 is an apocalyptic number.

121049575920 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 121049575920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271188642816).

121049575920 is an abundant number, since it is smaller than the sum of its proper divisors (421327709712).

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

121049575920 is a wasteful number, since it uses less digits than its factorization.

121049575920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 121049575920 in words is "one hundred twenty-one billion, forty-nine million, five hundred seventy-five thousand, nine hundred twenty".