21013213001 has 64 divisors (see below), whose sum is σ = 26239334400. Its totient is φ = 16578432000.

The previous prime is 21013212947. The next prime is 21013213019. The reversal of 21013213001 is 10031231012.

It is a cyclic number.

It is not a de Polignac number, because 21013213001 - 2²² = 21009018697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21013213201) 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, 28434290 + ... + 28435028.

It is an arithmetic number, because the mean of its divisors is an integer number (409989600).

Almost surely, 2^21013213001 is an apocalyptic number.

It is an amenable number.

21013213001 is a deficient number, since it is larger than the sum of its proper divisors (5226121399).

21013213001 is a wasteful number, since it uses less digits than its factorization.

21013213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21013213001 its reverse (10031231012), we get a palindrome (31044444013).

The spelling of 21013213001 in words is "twenty-one billion, thirteen million, two hundred thirteen thousand, one".