21204114131 has 2 divisors, whose sum is σ = 21204114132. Its totient is φ = 21204114130.

The previous prime is 21204114101. The next prime is 21204114149. The reversal of 21204114131 is 13141140212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21204114131 - 2²² = 21199919827 is a prime.

It is a super-2 number, since 2×21204114131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21204114101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10602057065 + 10602057066.

It is an arithmetic number, because the mean of its divisors is an integer number (10602057066).

Almost surely, 2^21204114131 is an apocalyptic number.

21204114131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21204114131 is an equidigital number, since it uses as much as digits as its factorization.

21204114131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21204114131 its reverse (13141140212), we get a palindrome (34345254343).

The spelling of 21204114131 in words is "twenty-one billion, two hundred four million, one hundred fourteen thousand, one hundred thirty-one".