21222364060660 has 96 divisors (see below), whose sum is σ = 51299864501760. Its totient is φ = 7224001694208.

The previous prime is 21222364060603. The next prime is 21222364060693. The reversal of 21222364060660 is 6606046322212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26620609 + ... + 27406231.

It is an arithmetic number, because the mean of its divisors is an integer number (534373588560).

Almost surely, 2^{21222364060660} is an apocalyptic number.

21222364060660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222364060660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25649932250880).

21222364060660 is an abundant number, since it is smaller than the sum of its proper divisors (30077500441100).

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

21222364060660 is a wasteful number, since it uses less digits than its factorization.

21222364060660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787025 (or 787023 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 21222364060660 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred sixty-four million, sixty thousand, six hundred sixty".