21230808601 has 16 divisors (see below), whose sum is σ = 22523840640. Its totient is φ = 19955825280.

The previous prime is 21230808589. The next prime is 21230808611. The reversal of 21230808601 is 10680803212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230808601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230808611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1646941 + ... + 1659781.

It is an arithmetic number, because the mean of its divisors is an integer number (1407740040).

Almost surely, 2^21230808601 is an apocalyptic number.

It is an amenable number.

21230808601 is a deficient number, since it is larger than the sum of its proper divisors (1293032039).

21230808601 is a wasteful number, since it uses less digits than its factorization.

21230808601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13536.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 21230808601 in words is "twenty-one billion, two hundred thirty million, eight hundred eight thousand, six hundred one".