21013313001 has 32 divisors (see below), whose sum is σ = 28733018112. Its totient is φ = 13655919360.

The previous prime is 21013312997. The next prime is 21013313003. The reversal of 21013313001 is 10031331012.

It is not a de Polignac number, because 21013313001 - 2² = 21013312997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21013313003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12124531 + ... + 12126263.

It is an arithmetic number, because the mean of its divisors is an integer number (897906816).

Almost surely, 2^21013313001 is an apocalyptic number.

It is an amenable number.

21013313001 is a deficient number, since it is larger than the sum of its proper divisors (7719705111).

21013313001 is a wasteful number, since it uses less digits than its factorization.

21013313001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21013313001 its reverse (10031331012), we get a palindrome (31044644013).

The spelling of 21013313001 in words is "twenty-one billion, thirteen million, three hundred thirteen thousand, one".