312220311322222 has 4 divisors (see below), whose sum is σ = 468330466983336. Its totient is φ = 156110155661110.

The previous prime is 312220311322219. The next prime is 312220311322223. The reversal of 312220311322222 is 222223113022213.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×312220311322222² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220311322223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78055077830554 + ... + 78055077830557.

It is an arithmetic number, because the mean of its divisors is an integer number (117082616745834).

Almost surely, 2^{312220311322222} is an apocalyptic number.

312220311322222 is a deficient number, since it is larger than the sum of its proper divisors (156110155661114).

312220311322222 is a wasteful number, since it uses less digits than its factorization.

312220311322222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156110155661113.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 312220311322222 its reverse (222223113022213), we get a palindrome (534443424344435).

The spelling of 312220311322222 in words is "three hundred twelve trillion, two hundred twenty billion, three hundred eleven million, three hundred twenty-two thousand, two hundred twenty-two".