21010722212260 has 48 divisors (see below), whose sum is σ = 48501087066432. Its totient is φ = 7581939996800.

The previous prime is 21010722212201. The next prime is 21010722212261. The reversal of 21010722212260 is 6221222701012.

It is not an unprimeable number, because it can be changed into a prime (21010722212261) 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, 364487527 + ... + 364545166.

It is an arithmetic number, because the mean of its divisors is an integer number (1010439313884).

Almost surely, 2^{21010722212260} is an apocalyptic number.

21010722212260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010722212260 is an abundant number, since it is smaller than the sum of its proper divisors (27490364854172).

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

21010722212260 is a wasteful number, since it uses less digits than its factorization.

21010722212260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729032844 (or 729032842 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 21010722212260 its reverse (6221222701012), we get a palindrome (27231944913272).

The spelling of 21010722212260 in words is "twenty-one trillion, ten billion, seven hundred twenty-two million, two hundred twelve thousand, two hundred sixty".