201122110211021 has 4 divisors (see below), whose sum is σ = 204123932751552. Its totient is φ = 198120287670492.

The previous prime is 201122110210907. The next prime is 201122110211041. The reversal of 201122110211021 is 120112011221102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201122110211021 - 2²⁶ = 201122043102157 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 (201122110211041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500911270165 + ... + 1500911270298.

It is an arithmetic number, because the mean of its divisors is an integer number (51030983187888).

Almost surely, 2^{201122110211021} is an apocalyptic number.

It is an amenable number.

201122110211021 is a deficient number, since it is larger than the sum of its proper divisors (3001822540531).

201122110211021 is an equidigital number, since it uses as much as digits as its factorization.

201122110211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001822540530.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201122110211021 its reverse (120112011221102), we get a palindrome (321234121432123).

The spelling of 201122110211021 in words is "two hundred one trillion, one hundred twenty-two billion, one hundred ten million, two hundred eleven thousand, twenty-one".