21044034031 has 2 divisors, whose sum is σ = 21044034032. Its totient is φ = 21044034030.

The previous prime is 21044034029. The next prime is 21044034059. The reversal of 21044034031 is 13043044012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21044034031 - 2¹ = 21044034029 is a prime.

It is a super-2 number, since 2×21044034031² (a number of 21 digits) contains 22 as substring.

Together with 21044034029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21044033993 and 21044034011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21044034061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10522017015 + 10522017016.

It is an arithmetic number, because the mean of its divisors is an integer number (10522017016).

Almost surely, 2^21044034031 is an apocalyptic number.

21044034031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21044034031 is an equidigital number, since it uses as much as digits as its factorization.

21044034031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21044034031 its reverse (13043044012), we get a palindrome (34087078043).

The spelling of 21044034031 in words is "twenty-one billion, forty-four million, thirty-four thousand, thirty-one".