21124200131 has 2 divisors, whose sum is σ = 21124200132. Its totient is φ = 21124200130.

The previous prime is 21124200121. The next prime is 21124200151. The reversal of 21124200131 is 13100242112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21124200131 is a prime.

It is a super-2 number, since 2×21124200131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21124200101) 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, 10562100065 + 10562100066.

It is an arithmetic number, because the mean of its divisors is an integer number (10562100066).

Almost surely, 2^21124200131 is an apocalyptic number.

21124200131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21124200131 is an equidigital number, since it uses as much as digits as its factorization.

21124200131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21124200131 its reverse (13100242112), we get a palindrome (34224442243).

The spelling of 21124200131 in words is "twenty-one billion, one hundred twenty-four million, two hundred thousand, one hundred thirty-one".