212210211000021 has 64 divisors (see below), whose sum is σ = 313461731573760. Its totient is φ = 126873589973760.

The previous prime is 212210211000001. The next prime is 212210211000049. The reversal of 212210211000021 is 120000112012212.

It is not a de Polignac number, because 212210211000021 - 2⁹ = 212210210999509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210211000001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4032318510 + ... + 4032371136.

It is an arithmetic number, because the mean of its divisors is an integer number (4897839555840).

Almost surely, 2^{212210211000021} is an apocalyptic number.

It is an amenable number.

212210211000021 is a deficient number, since it is larger than the sum of its proper divisors (101251520573739).

212210211000021 is a wasteful number, since it uses less digits than its factorization.

212210211000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65466.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212210211000021 its reverse (120000112012212), we get a palindrome (332210323012233).

The spelling of 212210211000021 in words is "two hundred twelve trillion, two hundred ten billion, two hundred eleven million, twenty-one", and thus it is an aban number.