21001132313 has 16 divisors (see below), whose sum is σ = 24508780800. Its totient is φ = 17987987808.

The previous prime is 21001132309. The next prime is 21001132349. The reversal of 21001132313 is 31323110012.

It is not a de Polignac number, because 21001132313 - 2² = 21001132309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21001132291 and 21001132300.

It is not an unprimeable number, because it can be changed into a prime (21001132213) 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, 470156 + ... + 512882.

It is an arithmetic number, because the mean of its divisors is an integer number (1531798800).

Almost surely, 2^21001132313 is an apocalyptic number.

It is an amenable number.

21001132313 is a deficient number, since it is larger than the sum of its proper divisors (3507648487).

21001132313 is an equidigital number, since it uses as much as digits as its factorization.

21001132313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44181 (or 44167 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21001132313 its reverse (31323110012), we get a palindrome (52324242325).

The spelling of 21001132313 in words is "twenty-one billion, one million, one hundred thirty-two thousand, three hundred thirteen".