212202222102021 has 4 divisors (see below), whose sum is σ = 282936296136032. Its totient is φ = 141468148068012.

The previous prime is 212202222102007. The next prime is 212202222102041. The reversal of 212202222102021 is 120201222202212.

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 not a de Polignac number, because 212202222102021 - 2⁶ = 212202222101957 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 (212202222102041) 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, 35367037017001 + ... + 35367037017006.

It is an arithmetic number, because the mean of its divisors is an integer number (70734074034008).

Almost surely, 2^{212202222102021} is an apocalyptic number.

It is an amenable number.

212202222102021 is a deficient number, since it is larger than the sum of its proper divisors (70734074034011).

212202222102021 is an equidigital number, since it uses as much as digits as its factorization.

212202222102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70734074034010.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 212202222102021 its reverse (120201222202212), we get a palindrome (332403444304233).

The spelling of 212202222102021 in words is "two hundred twelve trillion, two hundred two billion, two hundred twenty-two million, one hundred two thousand, twenty-one".