231202131321 has 16 divisors (see below), whose sum is σ = 355082092544. Its totient is φ = 131075222544.

The previous prime is 231202131311. The next prime is 231202131367. The reversal of 231202131321 is 123131202132.

It is not a de Polignac number, because 231202131321 - 2¹⁴ = 231202114937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231202131311) 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, 43342315 + ... + 43347648.

It is an arithmetic number, because the mean of its divisors is an integer number (22192630784).

Almost surely, 2^231202131321 is an apocalyptic number.

231202131321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231202131321 is a deficient number, since it is larger than the sum of its proper divisors (123879961223).

231202131321 is a wasteful number, since it uses less digits than its factorization.

231202131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86690100.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231202131321 its reverse (123131202132), we get a palindrome (354333333453).

The spelling of 231202131321 in words is "two hundred thirty-one billion, two hundred two million, one hundred thirty-one thousand, three hundred twenty-one".