1231710979917 has 16 divisors (see below), whose sum is σ = 1809318024000. Its totient is φ = 739100496000.

The previous prime is 1231710979913. The next prime is 1231710979927. The reversal of 1231710979917 is 7199790171321.

It is not a de Polignac number, because 1231710979917 - 2² = 1231710979913 is a prime.

It is a super-2 number, since 2×1231710979917² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231710979913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184771792 + ... + 184778457.

It is an arithmetic number, because the mean of its divisors is an integer number (113082376500).

Almost surely, 2^{1231710979917} is an apocalyptic number.

It is an amenable number.

1231710979917 is a deficient number, since it is larger than the sum of its proper divisors (577607044083).

1231710979917 is a wasteful number, since it uses less digits than its factorization.

1231710979917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369550364.

The product of its (nonzero) digits is 1500282, while the sum is 57.

The spelling of 1231710979917 in words is "one trillion, two hundred thirty-one billion, seven hundred ten million, nine hundred seventy-nine thousand, nine hundred seventeen".