21302123131131 has 32 divisors (see below), whose sum is σ = 29422159296000. Its totient is φ = 13693086747648.

The previous prime is 21302123131123. The next prime is 21302123131139. The reversal of 21302123131131 is 13113132120312.

It is an interprime number because it is at equal distance from previous prime (21302123131123) and next prime (21302123131139).

It is not a de Polignac number, because 21302123131131 - 2³ = 21302123131123 is a prime.

It is a super-2 number, since 2×21302123131131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21302123131139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 628568235 + ... + 628602123.

It is an arithmetic number, because the mean of its divisors is an integer number (919442478000).

Almost surely, 2^{21302123131131} is an apocalyptic number.

21302123131131 is a deficient number, since it is larger than the sum of its proper divisors (8120036164869).

21302123131131 is a wasteful number, since it uses less digits than its factorization.

21302123131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43523.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21302123131131 its reverse (13113132120312), we get a palindrome (34415255251443).

The spelling of 21302123131131 in words is "twenty-one trillion, three hundred two billion, one hundred twenty-three million, one hundred thirty-one thousand, one hundred thirty-one".