21104370031 has 2 divisors, whose sum is σ = 21104370032. Its totient is φ = 21104370030.

The previous prime is 21104369989. The next prime is 21104370037. The reversal of 21104370031 is 13007340112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21104370031 - 2⁹ = 21104369519 is a prime.

It is a super-2 number, since 2×21104370031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21104369984 and 21104370011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21104370037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10552185015 + 10552185016.

It is an arithmetic number, because the mean of its divisors is an integer number (10552185016).

Almost surely, 2^21104370031 is an apocalyptic number.

21104370031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21104370031 is an equidigital number, since it uses as much as digits as its factorization.

21104370031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The spelling of 21104370031 in words is "twenty-one billion, one hundred four million, three hundred seventy thousand, thirty-one".