201122220210021 has 48 divisors (see below), whose sum is σ = 317442512125440. Its totient is φ = 121691384220960.

The previous prime is 201122220210017. The next prime is 201122220210047. The reversal of 201122220210021 is 120012022221102.

It is a happy number.

201122220210021 is a `hidden beast` number, since 201 + 12 + 2 + 220 + 210 + 0 + 21 = 666.

It is not a de Polignac number, because 201122220210021 - 2² = 201122220210017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201122220209976 and 201122220210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122220210001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161964526 + ... + 163201568.

It is an arithmetic number, because the mean of its divisors is an integer number (6613385669280).

Almost surely, 2^{201122220210021} is an apocalyptic number.

It is an amenable number.

201122220210021 is a deficient number, since it is larger than the sum of its proper divisors (116320291915419).

201122220210021 is a wasteful number, since it uses less digits than its factorization.

201122220210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239766 (or 1239763 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201122220210021 its reverse (120012022221102), we get a palindrome (321134242431123).

The spelling of 201122220210021 in words is "two hundred one trillion, one hundred twenty-two billion, two hundred twenty million, two hundred ten thousand, twenty-one".