121331128488 has 32 divisors (see below), whose sum is σ = 316515988800. Its totient is φ = 38685287168.

The previous prime is 121331128453. The next prime is 121331128507. The reversal of 121331128488 is 884821133121.

It is a super-2 number, since 2×121331128488² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109900833 + ... + 109901936.

It is an arithmetic number, because the mean of its divisors is an integer number (9891124650).

Almost surely, 2^121331128488 is an apocalyptic number.

It is an amenable number.

121331128488 is an abundant number, since it is smaller than the sum of its proper divisors (195184860312).

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

121331128488 is a wasteful number, since it uses less digits than its factorization.

121331128488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219802801 (or 219802797 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The spelling of 121331128488 in words is "one hundred twenty-one billion, three hundred thirty-one million, one hundred twenty-eight thousand, four hundred eighty-eight".