2321121132 has 144 divisors (see below), whose sum is σ = 6574224384. Its totient is φ = 684480000.

The previous prime is 2321121119. The next prime is 2321121161. The reversal of 2321121132 is 2311211232.

It is a super-4 number, since 4×2321121132⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

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 an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5788132 + ... + 5788532.

It is an arithmetic number, because the mean of its divisors is an integer number (45654336).

Almost surely, 2^2321121132 is an apocalyptic number.

2321121132 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 2321121132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3287112192).

2321121132 is an abundant number, since it is smaller than the sum of its proper divisors (4253103252).

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

2321121132 is a wasteful number, since it uses less digits than its factorization.

2321121132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 775 counting only the distinct ones).

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

The square root of 2321121132 is about 48178.0150276036. The cubic root of 2321121132 is about 1324.0343992730.

Adding to 2321121132 its reverse (2311211232), we get a palindrome (4632332364).

The spelling of 2321121132 in words is "two billion, three hundred twenty-one million, one hundred twenty-one thousand, one hundred thirty-two".