212202101021 has 4 divisors (see below), whose sum is σ = 212221440000. Its totient is φ = 212182762044.

The previous prime is 212202101017. The next prime is 212202101039. The reversal of 212202101021 is 120101202212.

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 212202101021 - 2² = 212202101017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212202100987 and 212202101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212202101051) 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, 9653021 + ... + 9674978.

It is an arithmetic number, because the mean of its divisors is an integer number (53055360000).

Almost surely, 2^212202101021 is an apocalyptic number.

It is an amenable number.

212202101021 is a deficient number, since it is larger than the sum of its proper divisors (19338979).

212202101021 is a wasteful number, since it uses less digits than its factorization.

212202101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19338978.

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

Adding to 212202101021 its reverse (120101202212), we get a palindrome (332303303233).

The spelling of 212202101021 in words is "two hundred twelve billion, two hundred two million, one hundred one thousand, twenty-one".