21112665504337 has 4 divisors (see below), whose sum is σ = 23031998732016. Its totient is φ = 19193332276660.

The previous prime is 21112665504223. The next prime is 21112665504379. The reversal of 21112665504337 is 73340556621112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21112665504337 - 2⁴³ = 12316572482129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112665504397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959666613823 + ... + 959666613844.

It is an arithmetic number, because the mean of its divisors is an integer number (5757999683004).

Almost surely, 2^{21112665504337} is an apocalyptic number.

It is an amenable number.

21112665504337 is a deficient number, since it is larger than the sum of its proper divisors (1919333227679).

21112665504337 is a wasteful number, since it uses less digits than its factorization.

21112665504337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919333227678.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 21112665504337 in words is "twenty-one trillion, one hundred twelve billion, six hundred sixty-five million, five hundred four thousand, three hundred thirty-seven".