21013032213 has 12 divisors (see below), whose sum is σ = 30451028608. Its totient is φ = 13963055400.

The previous prime is 21013032137. The next prime is 21013032233. The reversal of 21013032213 is 31223031012.

21013032213 is a `hidden beast` number, since 210 + 130 + 322 + 1 + 3 = 666.

It is not a de Polignac number, because 21013032213 - 2⁹ = 21013031701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013032233) 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, 3799813 + ... + 3805338.

Almost surely, 2^21013032213 is an apocalyptic number.

It is an amenable number.

21013032213 is a deficient number, since it is larger than the sum of its proper divisors (9437996395).

21013032213 is a wasteful number, since it uses less digits than its factorization.

21013032213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7605464 (or 7605461 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21013032213 its reverse (31223031012), we get a palindrome (52236063225).

The spelling of 21013032213 in words is "twenty-one billion, thirteen million, thirty-two thousand, two hundred thirteen".