121472939520 has 480 divisors, whose sum is σ = 450421171200. Its totient is φ = 31342878720.

The previous prime is 121472939501. The next prime is 121472939531. The reversal of 121472939520 is 25939274121.

121472939520 is a `hidden beast` number, since 1 + 2 + 1 + 472 + 93 + 95 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

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 47 ways as a sum of consecutive naturals, for example, 19281331 + ... + 19287629.

It is an arithmetic number, because the mean of its divisors is an integer number (938377440).

Almost surely, 2^121472939520 is an apocalyptic number.

121472939520 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 121472939520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225210585600).

121472939520 is an abundant number, since it is smaller than the sum of its proper divisors (328948231680).

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

121472939520 is an frugal number, since it uses more digits than its factorization.

121472939520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6368 (or 6340 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 121472939520 in words is "one hundred twenty-one billion, four hundred seventy-two million, nine hundred thirty-nine thousand, five hundred twenty".