212413201021 has 64 divisors (see below), whose sum is σ = 267886725120. Its totient is φ = 164389616640.

The previous prime is 212413200959. The next prime is 212413201037. The reversal of 212413201021 is 120102314212.

It is a cyclic number.

It is not a de Polignac number, because 212413201021 - 2²⁹ = 211876330109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 212413201021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212413201061) 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, 42590890 + ... + 42595876.

It is an arithmetic number, because the mean of its divisors is an integer number (4185730080).

Almost surely, 2^212413201021 is an apocalyptic number.

It is an amenable number.

212413201021 is a deficient number, since it is larger than the sum of its proper divisors (55473524099).

212413201021 is a wasteful number, since it uses less digits than its factorization.

212413201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5234.

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

Adding to 212413201021 its reverse (120102314212), we get a palindrome (332515515233).

The spelling of 212413201021 in words is "two hundred twelve billion, four hundred thirteen million, two hundred one thousand, twenty-one".