2212111312 has 20 divisors (see below), whose sum is σ = 4286751300. Its totient is φ = 1105852928.

The previous prime is 2212111303. The next prime is 2212111333. The reversal of 2212111312 is 2131112122.

It can be written as a sum of positive squares in 2 ways, for example, as 758671936 + 1453439376 = 27544^2 + 38124^2 .

It is a super-2 number, since 2×2212111312² = 9786872913356722688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118488 + ... + 135880.

It is an arithmetic number, because the mean of its divisors is an integer number (214337565).

Almost surely, 2^2212111312 is an apocalyptic number.

It is an amenable number.

2212111312 is a deficient number, since it is larger than the sum of its proper divisors (2074639988).

2212111312 is a wasteful number, since it uses less digits than its factorization.

2212111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25350 (or 25344 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 2212111312 is about 47033.0874172640. The cubic root of 2212111312 is about 1302.9737273749.

Adding to 2212111312 its reverse (2131112122), we get a palindrome (4343223434).

It can be divided in two parts, 22121 and 11312, that added together give a palindrome (33433).

The spelling of 2212111312 in words is "two billion, two hundred twelve million, one hundred eleven thousand, three hundred twelve".