2311221132 has 144 divisors (see below), whose sum is σ = 6583423392. Its totient is φ = 677514240.

The previous prime is 2311221113. The next prime is 2311221137.

2311221132 is a `hidden beast` number, since 2 + 311 + 221 + 132 = 666.

2311221132 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×2311221132² = 10683486242006722848, 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 not an unprimeable number, because it can be changed into a prime (2311221137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3413578 + ... + 3414254.

It is an arithmetic number, because the mean of its divisors is an integer number (45718218).

Almost surely, 2^2311221132 is an apocalyptic number.

2311221132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2311221132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3291711696).

2311221132 is an abundant number, since it is smaller than the sum of its proper divisors (4272202260).

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

2311221132 is a wasteful number, since it uses less digits than its factorization.

2311221132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968 (or 963 counting only the distinct ones).

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

The square root of 2311221132 is about 48075.1612789806. The cubic root of 2311221132 is about 1322.1493015119.

It can be divided in two parts, 23112 and 21132, that added together give a palindrome (44244).

The spelling of 2311221132 in words is "two billion, three hundred eleven million, two hundred twenty-one thousand, one hundred thirty-two".