312220111302 has 64 divisors (see below), whose sum is σ = 757820344320. Its totient is φ = 94496767200.

The previous prime is 312220111261. The next prime is 312220111309. The reversal of 312220111302 is 203111022213.

312220111302 is a `hidden beast` number, since 31 + 2 + 220 + 111 + 302 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220111309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167563 + ... + 807785.

It is an arithmetic number, because the mean of its divisors is an integer number (11840942880).

Almost surely, 2^312220111302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312220111302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378910172160).

312220111302 is an abundant number, since it is smaller than the sum of its proper divisors (445600233018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312220111302 is a wasteful number, since it uses less digits than its factorization.

312220111302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641066 (or 641060 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 312220111302 its reverse (203111022213), we get a palindrome (515331133515).

The spelling of 312220111302 in words is "three hundred twelve billion, two hundred twenty million, one hundred eleven thousand, three hundred two".