121291337565696 has 160 divisors (see below), whose sum is σ = 342184893050880. Its totient is φ = 38046659280896.

The previous prime is 121291337565689. The next prime is 121291337565809. The reversal of 121291337565696 is 696565733192121.

It is a super-2 number, since 2×121291337565696² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 181379665 + ... + 182047151.

It is an arithmetic number, because the mean of its divisors is an integer number (2138655581568).

Almost surely, 2^{121291337565696} is an apocalyptic number.

121291337565696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121291337565696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171092446525440).

121291337565696 is an abundant number, since it is smaller than the sum of its proper divisors (220893555485184).

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

121291337565696 is an equidigital number, since it uses as much as digits as its factorization.

121291337565696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674484 (or 674468 counting only the distinct ones).

The product of its digits is 110224800, while the sum is 66.

The spelling of 121291337565696 in words is "one hundred twenty-one trillion, two hundred ninety-one billion, three hundred thirty-seven million, five hundred sixty-five thousand, six hundred ninety-six".