21622141172621 has 16 divisors (see below), whose sum is σ = 24976231167168. Its totient is φ = 18499543507200.

The previous prime is 21622141172617. The next prime is 21622141172659. The reversal of 21622141172621 is 12627114122612.

It is not a de Polignac number, because 21622141172621 - 2² = 21622141172617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21622141172221) 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, 2963831 + ... + 7213083.

It is an arithmetic number, because the mean of its divisors is an integer number (1561014447948).

Almost surely, 2^{21622141172621} is an apocalyptic number.

It is an amenable number.

21622141172621 is a deficient number, since it is larger than the sum of its proper divisors (3354089994547).

21622141172621 is a wasteful number, since it uses less digits than its factorization.

21622141172621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276492.

The product of its digits is 32256, while the sum is 38.

The spelling of 21622141172621 in words is "twenty-one trillion, six hundred twenty-two billion, one hundred forty-one million, one hundred seventy-two thousand, six hundred twenty-one".