21231313001 has 8 divisors (see below), whose sum is σ = 21520282560. Its totient is φ = 20944289808.

The previous prime is 21231312959. The next prime is 21231313003. The reversal of 21231313001 is 10031313212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21231313001 - 2¹⁸ = 21231050857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21231313003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464621 + ... + 508266.

It is an arithmetic number, because the mean of its divisors is an integer number (2690035320).

Almost surely, 2^21231313001 is an apocalyptic number.

It is an amenable number.

21231313001 is a deficient number, since it is larger than the sum of its proper divisors (288969559).

21231313001 is a wasteful number, since it uses less digits than its factorization.

21231313001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973183.

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

Adding to 21231313001 its reverse (10031313212), we get a palindrome (31262626213).

The spelling of 21231313001 in words is "twenty-one billion, two hundred thirty-one million, three hundred thirteen thousand, one".