2311212312 has 128 divisors (see below), whose sum is σ = 6602400000. Its totient is φ = 748673280.

The previous prime is 2311212311. The next prime is 2311212329. The reversal of 2311212312 is 2132121132.

2311212312 is a `hidden beast` number, since 231 + 121 + 2 + 312 = 666.

It is a super-2 number, since 2×2311212312² = 10683404702280770688, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311212311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4418883 + ... + 4419405.

It is an arithmetic number, because the mean of its divisors is an integer number (51581250).

Almost surely, 2^2311212312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2311212312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3301200000).

2311212312 is an abundant number, since it is smaller than the sum of its proper divisors (4291187688).

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

2311212312 is a wasteful number, since it uses less digits than its factorization.

2311212312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1068 counting only the distinct ones).

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

The square root of 2311212312 is about 48075.0695475316. The cubic root of 2311212312 is about 1322.1476196634.

Adding to 2311212312 its reverse (2132121132), we get a palindrome (4443333444).

The spelling of 2311212312 in words is "two billion, three hundred eleven million, two hundred twelve thousand, three hundred twelve".