21142334131 has 2 divisors, whose sum is σ = 21142334132. Its totient is φ = 21142334130.

The previous prime is 21142334123. The next prime is 21142334177. The reversal of 21142334131 is 13143324112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21142334131 - 2³ = 21142334123 is a prime.

It is a super-2 number, since 2×21142334131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21142334096 and 21142334105.

It is not a weakly prime, because it can be changed into another prime (21142334231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571167065 + 10571167066.

It is an arithmetic number, because the mean of its divisors is an integer number (10571167066).

Almost surely, 2^21142334131 is an apocalyptic number.

21142334131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142334131 is an equidigital number, since it uses as much as digits as its factorization.

21142334131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

Adding to 21142334131 its reverse (13143324112), we get a palindrome (34285658243).

The spelling of 21142334131 in words is "twenty-one billion, one hundred forty-two million, three hundred thirty-four thousand, one hundred thirty-one".