21021122201000 has 64 divisors (see below), whose sum is σ = 50333366191680. Its totient is φ = 8212903540800.

The previous prime is 21021122200951. The next prime is 21021122201011. The reversal of 21021122201000 is 10222112012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244388654 + ... + 244474653.

It is an arithmetic number, because the mean of its divisors is an integer number (786458846745).

Almost surely, 2^{21021122201000} is an apocalyptic number.

21021122201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021122201000 is an abundant number, since it is smaller than the sum of its proper divisors (29312243990680).

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

21021122201000 is a wasteful number, since it uses less digits than its factorization.

21021122201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488863371 (or 488863357 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21021122201000 its reverse (10222112012), we get a palindrome (21031344313012).

The spelling of 21021122201000 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-two million, two hundred one thousand".