21333031130 has 16 divisors (see below), whose sum is σ = 38779650504. Its totient is φ = 8448724800.

The previous prime is 21333031091. The next prime is 21333031169. The reversal of 21333031130 is 3113033312.

It is an interprime number because it is at equal distance from previous prime (21333031091) and next prime (21333031169).

It can be written as a sum of positive squares in 4 ways, for example, as 19674831289 + 1658199841 = 140267^2 + 40721^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10559897 + ... + 10561916.

Almost surely, 2^21333031130 is an apocalyptic number.

21333031130 is a deficient number, since it is larger than the sum of its proper divisors (17446619374).

21333031130 is a wasteful number, since it uses less digits than its factorization.

21333031130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121921.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21333031130 its reverse (3113033312), we get a palindrome (24446064442).

The spelling of 21333031130 in words is "twenty-one billion, three hundred thirty-three million, thirty-one thousand, one hundred thirty".