21612712263104 has 28 divisors (see below), whose sum is σ = 42899215180824. Its totient is φ = 10803461193984.

The previous prime is 21612712263061. The next prime is 21612712263119. The reversal of 21612712263104 is 40136221721612.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 44992622 + ... + 45470445.

Almost surely, 2^{21612712263104} is an apocalyptic number.

It is an amenable number.

21612712263104 is a deficient number, since it is larger than the sum of its proper divisors (21286502917720).

21612712263104 is an equidigital number, since it uses as much as digits as its factorization.

21612712263104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90466812 (or 90466802 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

Adding to 21612712263104 its reverse (40136221721612), we get a palindrome (61748933984716).

The spelling of 21612712263104 in words is "twenty-one trillion, six hundred twelve billion, seven hundred twelve million, two hundred sixty-three thousand, one hundred four".