21311310312122 has 16 divisors (see below), whose sum is σ = 32677217743680. Its totient is φ = 10420775945472.

The previous prime is 21311310312121. The next prime is 21311310312139. The reversal of 21311310312122 is 22121301311312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21311310312121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467864078 + ... + 467909625.

It is an arithmetic number, because the mean of its divisors is an integer number (2042326108980).

Almost surely, 2^{21311310312122} is an apocalyptic number.

21311310312122 is a deficient number, since it is larger than the sum of its proper divisors (11365907431558).

21311310312122 is a wasteful number, since it uses less digits than its factorization.

21311310312122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935773957.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21311310312122 its reverse (22121301311312), we get a palindrome (43432611623434).

The spelling of 21311310312122 in words is "twenty-one trillion, three hundred eleven billion, three hundred ten million, three hundred twelve thousand, one hundred twenty-two".