212210101212021 has 80 divisors (see below), whose sum is σ = 351025609112640. Its totient is φ = 126678090654720.

The previous prime is 212210101212007. The next prime is 212210101212041. The reversal of 212210101212021 is 120212101012212.

212210101212021 is a `hidden beast` number, since 212 + 210 + 10 + 1 + 212 + 0 + 21 = 666.

It is not a de Polignac number, because 212210101212021 - 2⁷ = 212210101211893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212210101211985 and 212210101212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210101212041) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 532835455 + ... + 533233571.

It is an arithmetic number, because the mean of its divisors is an integer number (4387820113908).

Almost surely, 2^{212210101212021} is an apocalyptic number.

It is an amenable number.

212210101212021 is a deficient number, since it is larger than the sum of its proper divisors (138815507900619).

212210101212021 is a wasteful number, since it uses less digits than its factorization.

212210101212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407136 (or 407127 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212210101212021 its reverse (120212101012212), we get a palindrome (332422202224233).

The spelling of 212210101212021 in words is "two hundred twelve trillion, two hundred ten billion, one hundred one million, two hundred twelve thousand, twenty-one".