201021221000010 has 64 divisors (see below), whose sum is σ = 485003522419200. Its totient is φ = 53322098135040.

The previous prime is 201021220999967. The next prime is 201021221000023. The reversal of 201021221000010 is 10000122120102.

It is a super-2 number, since 2×201021221000010² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201021221000010.

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, 51375120 + ... + 55149300.

It is an arithmetic number, because the mean of its divisors is an integer number (7578180037800).

Almost surely, 2^{201021221000010} is an apocalyptic number.

201021221000010 is an abundant number, since it is smaller than the sum of its proper divisors (283982301419190).

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

201021221000010 is a wasteful number, since it uses less digits than its factorization.

201021221000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3783583.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201021221000010 its reverse (10000122120102), we get a palindrome (211021343120112).

The spelling of 201021221000010 in words is "two hundred one trillion, twenty-one billion, two hundred twenty-one million, ten", and thus it is an aban number.