21333630131 has 16 divisors (see below), whose sum is σ = 23503443840. Its totient is φ = 19202574720.

The previous prime is 21333630091. The next prime is 21333630203. The reversal of 21333630131 is 13103633312.

It is a cyclic number.

It is not a de Polignac number, because 21333630131 - 2¹⁴ = 21333613747 is a prime.

It is a super-2 number, since 2×21333630131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21333630131.

It is not an unprimeable number, because it can be changed into a prime (21333630431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1258196 + ... + 1275038.

It is an arithmetic number, because the mean of its divisors is an integer number (1468965240).

Almost surely, 2^21333630131 is an apocalyptic number.

21333630131 is a deficient number, since it is larger than the sum of its proper divisors (2169813709).

21333630131 is a wasteful number, since it uses less digits than its factorization.

21333630131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17986.

The product of its (nonzero) digits is 2916, while the sum is 26.

The spelling of 21333630131 in words is "twenty-one billion, three hundred thirty-three million, six hundred thirty thousand, one hundred thirty-one".