21311321122 has 16 divisors (see below), whose sum is σ = 39343977792. Its totient is φ = 8430852240.

The previous prime is 21311321099. The next prime is 21311321137. The reversal of 21311321122 is 22112311312.

It is a self number, because there is not a number n which added to its sum of digits gives 21311321122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58547404 + ... + 58547767.

It is an arithmetic number, because the mean of its divisors is an integer number (2458998612).

Almost surely, 2^21311321122 is an apocalyptic number.

21311321122 is a deficient number, since it is larger than the sum of its proper divisors (18032656670).

21311321122 is a wasteful number, since it uses less digits than its factorization.

21311321122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117095193.

The product of its digits is 144, while the sum is 19.

Adding to 21311321122 its reverse (22112311312), we get a palindrome (43423632434).

The spelling of 21311321122 in words is "twenty-one billion, three hundred eleven million, three hundred twenty-one thousand, one hundred twenty-two".