121361137620 has 24 divisors (see below), whose sum is σ = 339811185504. Its totient is φ = 32362970016.

The previous prime is 121361137609. The next prime is 121361137699. The reversal of 121361137620 is 26731163121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011342754 + ... + 1011342873.

It is an arithmetic number, because the mean of its divisors is an integer number (14158799396).

Almost surely, 2^121361137620 is an apocalyptic number.

121361137620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121361137620 is an abundant number, since it is smaller than the sum of its proper divisors (218450047884).

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

121361137620 is a wasteful number, since it uses less digits than its factorization.

121361137620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022685639 (or 2022685637 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The spelling of 121361137620 in words is "one hundred twenty-one billion, three hundred sixty-one million, one hundred thirty-seven thousand, six hundred twenty".