201211122022101 has 12 divisors (see below), whose sum is σ = 290881907068428. Its totient is φ = 134028308151744.

The previous prime is 201211122022069. The next prime is 201211122022139. The reversal of 201211122022101 is 101220221112102.

201211122022101 is a `hidden beast` number, since 20 + 1 + 211 + 1 + 220 + 2 + 210 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 163681702254225 + 37529419767876 = 12793815^2 + 6126126^2 .

It is not a de Polignac number, because 201211122022101 - 2⁵ = 201211122022069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211122021101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9369977250 + ... + 9369998723.

It is an arithmetic number, because the mean of its divisors is an integer number (24240158922369).

Almost surely, 2^{201211122022101} is an apocalyptic number.

It is an amenable number.

201211122022101 is a deficient number, since it is larger than the sum of its proper divisors (89670785046327).

201211122022101 is a wasteful number, since it uses less digits than its factorization.

201211122022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18739977172 (or 18739977169 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201211122022101 its reverse (101220221112102), we get a palindrome (302431343134203).

Subtracting from 201211122022101 its reverse (101220221112102), we obtain a palindrome (99990900909999).

The spelling of 201211122022101 in words is "two hundred one trillion, two hundred eleven billion, one hundred twenty-two million, twenty-two thousand, one hundred one".