21122516605016 has 64 divisors (see below), whose sum is σ = 41758994534400. Its totient is φ = 9988650995328.

The previous prime is 21122516604967. The next prime is 21122516605033. The reversal of 21122516605016 is 61050661522112.

It is a super-4 number, since 4×21122516605016⁴ (a number of 54 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1078605161 + ... + 1078624743.

It is an arithmetic number, because the mean of its divisors is an integer number (652484289600).

Almost surely, 2^{21122516605016} is an apocalyptic number.

It is an amenable number.

21122516605016 is a deficient number, since it is larger than the sum of its proper divisors (20636477929384).

21122516605016 is a wasteful number, since it uses less digits than its factorization.

21122516605016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31128 (or 31124 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 21122516605016 in words is "twenty-one trillion, one hundred twenty-two billion, five hundred sixteen million, six hundred five thousand, sixteen".