21230313013 has 16 divisors (see below), whose sum is σ = 26335375360. Its totient is φ = 16665336576.

The previous prime is 21230312993. The next prime is 21230313029. The reversal of 21230313013 is 31031303212.

It is not a de Polignac number, because 21230313013 - 2¹⁷ = 21230181941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230313113) 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, 906948 + ... + 930061.

It is an arithmetic number, because the mean of its divisors is an integer number (1645960960).

Almost surely, 2^21230313013 is an apocalyptic number.

It is an amenable number.

21230313013 is a deficient number, since it is larger than the sum of its proper divisors (5105062347).

21230313013 is a wasteful number, since it uses less digits than its factorization.

21230313013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837156.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21230313013 its reverse (31031303212), we get a palindrome (52261616225).

The spelling of 21230313013 in words is "twenty-one billion, two hundred thirty million, three hundred thirteen thousand, thirteen".