21313020001 has 16 divisors (see below), whose sum is σ = 26243086464. Its totient is φ = 16855542144.

The previous prime is 21313019999. The next prime is 21313020007. The reversal of 21313020001 is 10002031312.

It is not a de Polignac number, because 21313020001 - 2¹ = 21313019999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (21313020007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158046 + ... + 260008.

It is an arithmetic number, because the mean of its divisors is an integer number (1640192904).

Almost surely, 2^21313020001 is an apocalyptic number.

It is an amenable number.

21313020001 is a deficient number, since it is larger than the sum of its proper divisors (4930066463).

21313020001 is a wasteful number, since it uses less digits than its factorization.

21313020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104280.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21313020001 its reverse (10002031312), we get a palindrome (31315051313).

The spelling of 21313020001 in words is "twenty-one billion, three hundred thirteen million, twenty thousand, one".