21311303122 has 16 divisors (see below), whose sum is σ = 33857113752. Its totient is φ = 10025959680.

The previous prime is 21311303113. The next prime is 21311303137. The reversal of 21311303122 is 22130311312.

It can be written as a sum of positive squares in 4 ways, for example, as 12950212401 + 8361090721 = 113799^2 + 91439^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21311303122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31888 + ... + 208900.

Almost surely, 2^21311303122 is an apocalyptic number.

21311303122 is a deficient number, since it is larger than the sum of its proper divisors (12545810630).

21311303122 is a wasteful number, since it uses less digits than its factorization.

21311303122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180573.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21311303122 its reverse (22130311312), we get a palindrome (43441614434).

The spelling of 21311303122 in words is "twenty-one billion, three hundred eleven million, three hundred three thousand, one hundred twenty-two".