21023022213 has 12 divisors (see below), whose sum is σ = 30413099340. Its totient is φ = 13993881216.

The previous prime is 21023022187. The next prime is 21023022247. The reversal of 21023022213 is 31222032012.

21023022213 is a `hidden beast` number, since 210 + 230 + 2 + 221 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1695627684 + 19327394529 = 41178^2 + 139023^2 .

It is not a de Polignac number, because 21023022213 - 2⁶ = 21023022149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023023213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1782708 + ... + 1794461.

It is an arithmetic number, because the mean of its divisors is an integer number (2534424945).

Almost surely, 2^21023022213 is an apocalyptic number.

It is an amenable number.

21023022213 is a deficient number, since it is larger than the sum of its proper divisors (9390077127).

21023022213 is a wasteful number, since it uses less digits than its factorization.

21023022213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577828 (or 3577825 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21023022213 its reverse (31222032012), we get a palindrome (52245054225).

The spelling of 21023022213 in words is "twenty-one billion, twenty-three million, twenty-two thousand, two hundred thirteen".