311722221122 has 8 divisors (see below), whose sum is σ = 503551280316. Its totient is φ = 143871794352.

The previous prime is 311722221121. The next prime is 311722221137. The reversal of 311722221122 is 221122227113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 304360752721 + 7361468401 = 551689^2 + 85799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 11989316197 = 311722221122 / (3 + 1 + 1 + 7 + 2 + 2 + 2 + 2 + 1 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 311722221091 and 311722221100.

It is not an unprimeable number, because it can be changed into a prime (311722221121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5994658073 + ... + 5994658124.

Almost surely, 2^311722221122 is an apocalyptic number.

311722221122 is a deficient number, since it is larger than the sum of its proper divisors (191829059194).

311722221122 is a wasteful number, since it uses less digits than its factorization.

311722221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11989316212.

The product of its digits is 1344, while the sum is 26.

Adding to 311722221122 its reverse (221122227113), we get a palindrome (532844448235).

The spelling of 311722221122 in words is "three hundred eleven billion, seven hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-two".