23220021213 has 6 divisors (see below), whose sum is σ = 33540030654. Its totient is φ = 15480014136.

The previous prime is 23220021211. The next prime is 23220021229. The reversal of 23220021213 is 31212002232.

23220021213 is a `hidden beast` number, since 232 + 200 + 21 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23217531129 + 2490084 = 152373^2 + 1578^2 .

It is not a de Polignac number, because 23220021213 - 2¹ = 23220021211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220021211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1290001170 + ... + 1290001187.

It is an arithmetic number, because the mean of its divisors is an integer number (5590005109).

Almost surely, 2^23220021213 is an apocalyptic number.

It is an amenable number.

23220021213 is a deficient number, since it is larger than the sum of its proper divisors (10320009441).

23220021213 is a wasteful number, since it uses less digits than its factorization.

23220021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580002363 (or 2580002360 counting only the distinct ones).

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

Adding to 23220021213 its reverse (31212002232), we get a palindrome (54432023445).

The spelling of 23220021213 in words is "twenty-three billion, two hundred twenty million, twenty-one thousand, two hundred thirteen".