20131230232131 has 16 divisors (see below), whose sum is σ = 27012880200864. Its totient is φ = 13335201944064.

The previous prime is 20131230232123. The next prime is 20131230232151. The reversal of 20131230232131 is 13123203213102.

It is not a de Polignac number, because 20131230232131 - 2³ = 20131230232123 is a prime.

It is a super-2 number, since 2×20131230232131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20131230232151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71232901 + ... + 71514953.

It is an arithmetic number, because the mean of its divisors is an integer number (1688305012554).

Almost surely, 2^{20131230232131} is an apocalyptic number.

20131230232131 is a deficient number, since it is larger than the sum of its proper divisors (6881649968733).

20131230232131 is a wasteful number, since it uses less digits than its factorization.

20131230232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433750.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20131230232131 its reverse (13123203213102), we get a palindrome (33254433445233).

The spelling of 20131230232131 in words is "twenty trillion, one hundred thirty-one billion, two hundred thirty million, two hundred thirty-two thousand, one hundred thirty-one".