21001110313331 has 8 divisors (see below), whose sum is σ = 21023009201040. Its totient is φ = 20979213100128.

The previous prime is 21001110313301. The next prime is 21001110313397. The reversal of 21001110313331 is 13331301110012.

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 21001110313331 - 2²² = 21001106119027 is a prime.

It is a super-2 number, since 2×21001110313331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001110313301) 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, 25513880 + ... + 26324138.

It is an arithmetic number, because the mean of its divisors is an integer number (2627876150130).

Almost surely, 2^{21001110313331} is an apocalyptic number.

21001110313331 is a deficient number, since it is larger than the sum of its proper divisors (21898887709).

21001110313331 is an equidigital number, since it uses as much as digits as its factorization.

21001110313331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837253.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 21001110313331 its reverse (13331301110012), we get a palindrome (34332411423343).

The spelling of 21001110313331 in words is "twenty-one trillion, one billion, one hundred ten million, three hundred thirteen thousand, three hundred thirty-one".