20100312131 has 2 divisors, whose sum is σ = 20100312132. Its totient is φ = 20100312130.

The previous prime is 20100312109. The next prime is 20100312137. The reversal of 20100312131 is 13121300102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100312131 is a prime.

It is a super-2 number, since 2×20100312131² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20100312137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050156065 + 10050156066.

It is an arithmetic number, because the mean of its divisors is an integer number (10050156066).

Almost surely, 2^20100312131 is an apocalyptic number.

20100312131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100312131 is an equidigital number, since it uses as much as digits as its factorization.

20100312131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20100312131 its reverse (13121300102), we get a palindrome (33221612233).

The spelling of 20100312131 in words is "twenty billion, one hundred million, three hundred twelve thousand, one hundred thirty-one".