21104364331 has 2 divisors, whose sum is σ = 21104364332. Its totient is φ = 21104364330.

The previous prime is 21104364283. The next prime is 21104364367. The reversal of 21104364331 is 13346340112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21104364331 - 2¹³ = 21104356139 is a prime.

It is a super-2 number, since 2×21104364331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21104364331.

It is not a weakly prime, because it can be changed into another prime (21104364131) 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, 10552182165 + 10552182166.

It is an arithmetic number, because the mean of its divisors is an integer number (10552182166).

Almost surely, 2^21104364331 is an apocalyptic number.

21104364331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21104364331 is an equidigital number, since it uses as much as digits as its factorization.

21104364331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 21104364331 in words is "twenty-one billion, one hundred four million, three hundred sixty-four thousand, three hundred thirty-one".