201202212021 has 4 divisors (see below), whose sum is σ = 268269616032. Its totient is φ = 134134808012.

The previous prime is 201202212017. The next prime is 201202212041. The reversal of 201202212021 is 120212202102.

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 201202212021 - 2² = 201202212017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201202212041) 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, 33533702001 + ... + 33533702006.

It is an arithmetic number, because the mean of its divisors is an integer number (67067404008).

Almost surely, 2^201202212021 is an apocalyptic number.

It is an amenable number.

201202212021 is a deficient number, since it is larger than the sum of its proper divisors (67067404011).

201202212021 is an equidigital number, since it uses as much as digits as its factorization.

201202212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67067404010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201202212021 its reverse (120212202102), we get a palindrome (321414414123).

The spelling of 201202212021 in words is "two hundred one billion, two hundred two million, two hundred twelve thousand, twenty-one".