201122012021 has 4 divisors (see below), whose sum is σ = 229853728032. Its totient is φ = 172390296012.

The previous prime is 201122012011. The next prime is 201122012027. The reversal of 201122012021 is 120210221102.

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 201122012021 - 2¹⁴ = 201121995637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201122011987 and 201122012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122012027) 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, 14365857995 + ... + 14365858008.

It is an arithmetic number, because the mean of its divisors is an integer number (57463432008).

Almost surely, 2^201122012021 is an apocalyptic number.

It is an amenable number.

201122012021 is a deficient number, since it is larger than the sum of its proper divisors (28731716011).

201122012021 is an equidigital number, since it uses as much as digits as its factorization.

201122012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28731716010.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201122012021 its reverse (120210221102), we get a palindrome (321332233123).

The spelling of 201122012021 in words is "two hundred one billion, one hundred twenty-two million, twelve thousand, twenty-one".