131223004010021 has 16 divisors (see below), whose sum is σ = 163603702281600. Its totient is φ = 102251068946880.

The previous prime is 131223004009967. The next prime is 131223004010023. The reversal of 131223004010021 is 120010400322131.

It is not a de Polignac number, because 131223004010021 - 2¹⁸ = 131223003747877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131223004009975 and 131223004010002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223004010023) 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, 7751135 + ... + 17959011.

It is an arithmetic number, because the mean of its divisors is an integer number (10225231392600).

Almost surely, 2^{131223004010021} is an apocalyptic number.

131223004010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131223004010021 is a deficient number, since it is larger than the sum of its proper divisors (32380698271579).

131223004010021 is a wasteful number, since it uses less digits than its factorization.

131223004010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374844.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131223004010021 its reverse (120010400322131), we get a palindrome (251233404332152).

The spelling of 131223004010021 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, four million, ten thousand, twenty-one".