121951213936 has 20 divisors (see below), whose sum is σ = 248716292200. Its totient is φ = 57766364352.

The previous prime is 121951213919. The next prime is 121951213961. The reversal of 121951213936 is 639312159121.

It is a super-2 number, since 2×121951213936² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121951213892 and 121951213901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200577351 + ... + 200577958.

It is an arithmetic number, because the mean of its divisors is an integer number (12435814610).

Almost surely, 2^121951213936 is an apocalyptic number.

121951213936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121951213936 is an abundant number, since it is smaller than the sum of its proper divisors (126765078264).

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

121951213936 is a wasteful number, since it uses less digits than its factorization.

121951213936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401155336 (or 401155330 counting only the distinct ones).

The product of its digits is 87480, while the sum is 43.

The spelling of 121951213936 in words is "one hundred twenty-one billion, nine hundred fifty-one million, two hundred thirteen thousand, nine hundred thirty-six".