201212120220121 has 16 divisors (see below), whose sum is σ = 202852986336000. Its totient is φ = 199575159018048.

The previous prime is 201212120220119. The next prime is 201212120220143. The reversal of 201212120220121 is 121022021212102.

It is a cyclic number.

It is not a de Polignac number, because 201212120220121 - 2¹ = 201212120220119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201212120226121) 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, 2316227275 + ... + 2316314143.

It is an arithmetic number, because the mean of its divisors is an integer number (12678311646000).

Almost surely, 2^{201212120220121} is an apocalyptic number.

It is an amenable number.

201212120220121 is a deficient number, since it is larger than the sum of its proper divisors (1640866115879).

201212120220121 is a wasteful number, since it uses less digits than its factorization.

201212120220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109128.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201212120220121 its reverse (121022021212102), we get a palindrome (322234141432223).

The spelling of 201212120220121 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty million, two hundred twenty thousand, one hundred twenty-one".