126205116931 has 8 divisors (see below), whose sum is σ = 131696778240. Its totient is φ = 120713829192.

The previous prime is 126205116911. The next prime is 126205116943. The reversal of 126205116931 is 139611502621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126205116931 - 2⁵ = 126205116899 is a prime.

It is a super-2 number, since 2×126205116931² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126205116911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764910 + ... + 915148.

It is an arithmetic number, because the mean of its divisors is an integer number (16462097280).

Almost surely, 2^126205116931 is an apocalyptic number.

126205116931 is a deficient number, since it is larger than the sum of its proper divisors (5491661309).

126205116931 is a wasteful number, since it uses less digits than its factorization.

126205116931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186785.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 126205116931 in words is "one hundred twenty-six billion, two hundred five million, one hundred sixteen thousand, nine hundred thirty-one".