201212022120021 has 24 divisors (see below), whose sum is σ = 330846645070656. Its totient is φ = 116644650503040.

The previous prime is 201212022120007. The next prime is 201212022120023. The reversal of 201212022120021 is 120021220212102.

It is a happy number.

201212022120021 is a `hidden beast` number, since 201 + 2 + 1 + 20 + 221 + 200 + 21 = 666.

It is not a de Polignac number, because 201212022120021 - 2¹¹ = 201212022117973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201212022119976 and 201212022120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212022120023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44183577460 + ... + 44183582013.

It is an arithmetic number, because the mean of its divisors is an integer number (13785276877944).

Almost surely, 2^{201212022120021} is an apocalyptic number.

It is an amenable number.

201212022120021 is a deficient number, since it is larger than the sum of its proper divisors (129634622950635).

201212022120021 is a wasteful number, since it uses less digits than its factorization.

201212022120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88367159513 (or 88367159510 counting only the distinct ones).

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

Adding to 201212022120021 its reverse (120021220212102), we get a palindrome (321233242332123).

The spelling of 201212022120021 in words is "two hundred one trillion, two hundred twelve billion, twenty-two million, one hundred twenty thousand, twenty-one".