201222012112021 has 4 divisors (see below), whose sum is σ = 201222086529100. Its totient is φ = 201221937694944.

The previous prime is 201222012112001. The next prime is 201222012112027. The reversal of 201222012112021 is 120211210222102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158674583492100 + 42547428619921 = 12596610^2 + 6522839^2 .

It is a cyclic number.

It is not a de Polignac number, because 201222012112021 - 2²³ = 201222003723413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201222012112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222012112027) 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, 32993406 + ... + 38613583.

It is an arithmetic number, because the mean of its divisors is an integer number (50305521632275).

Almost surely, 2^{201222012112021} is an apocalyptic number.

It is an amenable number.

201222012112021 is a deficient number, since it is larger than the sum of its proper divisors (74417079).

201222012112021 is an equidigital number, since it uses as much as digits as its factorization.

201222012112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74417078.

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

Adding to 201222012112021 its reverse (120211210222102), we get a palindrome (321433222334123).

The spelling of 201222012112021 in words is "two hundred one trillion, two hundred twenty-two billion, twelve million, one hundred twelve thousand, twenty-one".