121802396520 has 64 divisors (see below), whose sum is σ = 417608219520. Its totient is φ = 27840547584.

The previous prime is 121802396503. The next prime is 121802396557. The reversal of 121802396520 is 25693208121.

It is a super-2 number, since 2×121802396520² (a number of 23 digits) contains 22 as substring.

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, 72500587 + ... + 72502266.

It is an arithmetic number, because the mean of its divisors is an integer number (6525128430).

Almost surely, 2^121802396520 is an apocalyptic number.

121802396520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121802396520 is an abundant number, since it is smaller than the sum of its proper divisors (295805823000).

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

121802396520 is a wasteful number, since it uses less digits than its factorization.

121802396520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145002874 (or 145002870 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 121802396520 in words is "one hundred twenty-one billion, eight hundred two million, three hundred ninety-six thousand, five hundred twenty".