201212122122101 has 8 divisors (see below), whose sum is σ = 213048255533400. Its totient is φ = 189376002736128.

The previous prime is 201212122122091. The next prime is 201212122122131. The reversal of 201212122122101 is 101221221212102.

It can be written as a sum of positive squares in 4 ways, for example, as 162317129659876 + 38894992462225 = 12740374^2 + 6236585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201212122122101 - 2²⁶ = 201212055013237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212122122131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46007285 + ... + 50190581.

It is an arithmetic number, because the mean of its divisors is an integer number (26631031941675).

Almost surely, 2^{201212122122101} is an apocalyptic number.

It is an amenable number.

201212122122101 is a deficient number, since it is larger than the sum of its proper divisors (11836133411299).

201212122122101 is a wasteful number, since it uses less digits than its factorization.

201212122122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7012663.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201212122122101 its reverse (101221221212102), we get a palindrome (302433343334203).

Subtracting from 201212122122101 its reverse (101221221212102), we obtain a palindrome (99990900909999).

The spelling of 201212122122101 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred one".