21216416622140 has 36 divisors (see below), whose sum is σ = 45522612074856. Its totient is φ = 8306001383712.

The previous prime is 21216416622139. The next prime is 21216416622197. The reversal of 21216416622140 is 4122661461212.

It is a junction number, because it is equal to n+sod(n) for n = 21216416622094 and 21216416622103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240069182 + ... + 240157541.

Almost surely, 2^{21216416622140} is an apocalyptic number.

21216416622140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21216416622140 is an abundant number, since it is smaller than the sum of its proper divisors (24306195452716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21216416622140 is a wasteful number, since it uses less digits than its factorization.

21216416622140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480226826 (or 480226777 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 21216416622140 in words is "twenty-one trillion, two hundred sixteen billion, four hundred sixteen million, six hundred twenty-two thousand, one hundred forty".