212413120021 has 16 divisors (see below), whose sum is σ = 225859726080. Its totient is φ = 199073064960.

The previous prime is 212413119983. The next prime is 212413120027. The reversal of 212413120021 is 120021314212.

It is a cyclic number.

It is not a de Polignac number, because 212413120021 - 2⁹ = 212413119509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212413120027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9280890 + ... + 9303748.

It is an arithmetic number, because the mean of its divisors is an integer number (14116232880).

Almost surely, 2^212413120021 is an apocalyptic number.

It is an amenable number.

212413120021 is a deficient number, since it is larger than the sum of its proper divisors (13446606059).

212413120021 is a wasteful number, since it uses less digits than its factorization.

212413120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25164.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212413120021 its reverse (120021314212), we get a palindrome (332434434233).

The spelling of 212413120021 in words is "two hundred twelve billion, four hundred thirteen million, one hundred twenty thousand, twenty-one".