21616232112643 has 16 divisors (see below), whose sum is σ = 25110690312960. Its totient is φ = 18223414941600.

The previous prime is 21616232112637. The next prime is 21616232112649. The reversal of 21616232112643 is 34621123261612.

It is an interprime number because it is at equal distance from previous prime (21616232112637) and next prime (21616232112649).

It is a cyclic number.

It is not a de Polignac number, because 21616232112643 - 2³⁷ = 21478793159171 is a prime.

It is a super-2 number, since 2×21616232112643² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21616232112596 and 21616232112605.

It is not an unprimeable number, because it can be changed into a prime (21616232112649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6066348 + ... + 8946118.

It is an arithmetic number, because the mean of its divisors is an integer number (1569418144560).

Almost surely, 2^{21616232112643} is an apocalyptic number.

21616232112643 is a deficient number, since it is larger than the sum of its proper divisors (3494458200317).

21616232112643 is a wasteful number, since it uses less digits than its factorization.

21616232112643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897418.

The product of its digits is 124416, while the sum is 40.

The spelling of 21616232112643 in words is "twenty-one trillion, six hundred sixteen billion, two hundred thirty-two million, one hundred twelve thousand, six hundred forty-three".