21131130331 has 8 divisors (see below), whose sum is σ = 22223499264. Its totient is φ = 20053230120.

The previous prime is 21131130287. The next prime is 21131130389. The reversal of 21131130331 is 13303113112.

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 21131130331 - 2²⁵ = 21097575899 is a prime.

It is a super-2 number, since 2×21131130331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21131130299 and 21131130308.

It is not an unprimeable number, because it can be changed into a prime (21131130131) 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, 3614185 + ... + 3620026.

It is an arithmetic number, because the mean of its divisors is an integer number (2777937408).

Almost surely, 2^21131130331 is an apocalyptic number.

21131130331 is a deficient number, since it is larger than the sum of its proper divisors (1092368933).

21131130331 is a wasteful number, since it uses less digits than its factorization.

21131130331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7234361.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21131130331 its reverse (13303113112), we get a palindrome (34434243443).

The spelling of 21131130331 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty thousand, three hundred thirty-one".