21234201331 has 8 divisors (see below), whose sum is σ = 25104474720. Its totient is φ = 17573131968.

The previous prime is 21234201323. The next prime is 21234201341. The reversal of 21234201331 is 13310243212.

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

It is not a de Polignac number, because 21234201331 - 2³ = 21234201323 is a prime.

It is a super-2 number, since 2×21234201331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21234201301) 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, 52300786 + ... + 52301191.

It is an arithmetic number, because the mean of its divisors is an integer number (3138059340).

Almost surely, 2^21234201331 is an apocalyptic number.

21234201331 is a deficient number, since it is larger than the sum of its proper divisors (3870273389).

21234201331 is a wasteful number, since it uses less digits than its factorization.

21234201331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104602013.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21234201331 its reverse (13310243212), we get a palindrome (34544444543).

The spelling of 21234201331 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, three hundred thirty-one".