312220312111 has 4 divisors (see below), whose sum is σ = 322986529800. Its totient is φ = 301454094424.

The previous prime is 312220312099. The next prime is 312220312139. The reversal of 312220312111 is 111213022213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111213022213 = 103289 ⋅1076717.

It is a cyclic number.

It is not a de Polignac number, because 312220312111 - 2²⁵ = 312186757679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220312141) 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, 5383108801 + ... + 5383108858.

It is an arithmetic number, because the mean of its divisors is an integer number (80746632450).

Almost surely, 2^312220312111 is an apocalyptic number.

312220312111 is a deficient number, since it is larger than the sum of its proper divisors (10766217689).

312220312111 is a wasteful number, since it uses less digits than its factorization.

312220312111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10766217688.

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

Adding to 312220312111 its reverse (111213022213), we get a palindrome (423433334324).

The spelling of 312220312111 in words is "three hundred twelve billion, two hundred twenty million, three hundred twelve thousand, one hundred eleven".