21044030131 has 2 divisors, whose sum is σ = 21044030132. Its totient is φ = 21044030130.

The previous prime is 21044030129. The next prime is 21044030141. The reversal of 21044030131 is 13103044012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21044030131 - 2¹ = 21044030129 is a prime.

It is a super-2 number, since 2×21044030131² (a number of 21 digits) contains 22 as substring.

Together with 21044030129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21044030099 and 21044030108.

It is not a weakly prime, because it can be changed into another prime (21044030141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10522015065 + 10522015066.

It is an arithmetic number, because the mean of its divisors is an integer number (10522015066).

Almost surely, 2^21044030131 is an apocalyptic number.

21044030131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21044030131 is an equidigital number, since it uses as much as digits as its factorization.

21044030131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21044030131 its reverse (13103044012), we get a palindrome (34147074143).

The spelling of 21044030131 in words is "twenty-one billion, forty-four million, thirty thousand, one hundred thirty-one".