2211312512 has 64 divisors (see below), whose sum is σ = 4475250000. Its totient is φ = 1088237568.

The previous prime is 2211312487. The next prime is 2211312517. The reversal of 2211312512 is 2152131122.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211312517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4431239 + ... + 4431737.

Almost surely, 2^2211312512 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 2211312512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2237625000).

2211312512 is an abundant number, since it is smaller than the sum of its proper divisors (2263937488).

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

2211312512 is an equidigital number, since it uses as much as digits as its factorization.

2211312512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 979 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 2211312512 is about 47024.5947563613. The cubic root of 2211312512 is about 1302.8168725919.

Adding to 2211312512 its reverse (2152131122), we get a palindrome (4363443634).

The spelling of 2211312512 in words is "two billion, two hundred eleven million, three hundred twelve thousand, five hundred twelve".