121350012520 has 64 divisors (see below), whose sum is σ = 304196601600. Its totient is φ = 43188391680.

The previous prime is 121350012499. The next prime is 121350012541. The reversal of 121350012520 is 25210053121.

It is an interprime number because it is at equal distance from previous prime (121350012499) and next prime (121350012541).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 121350012491 and 121350012500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2913315 + ... + 2954674.

It is an arithmetic number, because the mean of its divisors is an integer number (4753071900).

Almost surely, 2^121350012520 is an apocalyptic number.

121350012520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121350012520 is an abundant number, since it is smaller than the sum of its proper divisors (182846589080).

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

121350012520 is a wasteful number, since it uses less digits than its factorization.

121350012520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5868058 (or 5868054 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 121350012520 its reverse (25210053121), we get a palindrome (146560065641).

The spelling of 121350012520 in words is "one hundred twenty-one billion, three hundred fifty million, twelve thousand, five hundred twenty".