21022230213 has 8 divisors (see below), whose sum is σ = 31144044800. Its totient is φ = 14014820124.

The previous prime is 21022230197. The next prime is 21022230227. The reversal of 21022230213 is 31203222012.

It is not a de Polignac number, because 21022230213 - 2⁴ = 21022230197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022230263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389300533 + ... + 389300586.

It is an arithmetic number, because the mean of its divisors is an integer number (3893005600).

Almost surely, 2^21022230213 is an apocalyptic number.

It is an amenable number.

21022230213 is a deficient number, since it is larger than the sum of its proper divisors (10121814587).

21022230213 is an equidigital number, since it uses as much as digits as its factorization.

21022230213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778601128 (or 778601122 counting only the distinct ones).

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

Adding to 21022230213 its reverse (31203222012), we get a palindrome (52225452225).

The spelling of 21022230213 in words is "twenty-one billion, twenty-two million, two hundred thirty thousand, two hundred thirteen".