121699307131 has 12 divisors (see below), whose sum is σ = 129112173120. Its totient is φ = 114590414880.

The previous prime is 121699307111. The next prime is 121699307143. The reversal of 121699307131 is 131703996121.

It is not a de Polignac number, because 121699307131 - 2¹⁵ = 121699274363 is a prime.

It is a super-2 number, since 2×121699307131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121699307111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1391376 + ... + 1476253.

It is an arithmetic number, because the mean of its divisors is an integer number (10759347760).

Almost surely, 2^121699307131 is an apocalyptic number.

121699307131 is a deficient number, since it is larger than the sum of its proper divisors (7412865989).

121699307131 is an equidigital number, since it uses as much as digits as its factorization.

121699307131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867734 (or 2867697 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The spelling of 121699307131 in words is "one hundred twenty-one billion, six hundred ninety-nine million, three hundred seven thousand, one hundred thirty-one".