2321131212 has 36 divisors (see below), whose sum is σ = 6025883136. Its totient is φ = 752798880.

The previous prime is 2321131207. The next prime is 2321131217. The reversal of 2321131212 is 2121311232.

2321131212 is a `hidden beast` number, since 2 + 321 + 131 + 212 = 666.

It is an interprime number because it is at equal distance from previous prime (2321131207) and next prime (2321131217).

It is a tau number, because it is divible by the number of its divisors (36).

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 (2321131217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 869964 + ... + 872627.

Almost surely, 2^2321131212 is an apocalyptic number.

It is an amenable number.

2321131212 is an abundant number, since it is smaller than the sum of its proper divisors (3704751924).

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

2321131212 is a wasteful number, since it uses less digits than its factorization.

2321131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742638 (or 1742633 counting only the distinct ones).

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

The square root of 2321131212 is about 48178.1196395210. The cubic root of 2321131212 is about 1324.0363159111.

Adding to 2321131212 its reverse (2121311232), we get a palindrome (4442442444).

The spelling of 2321131212 in words is "two billion, three hundred twenty-one million, one hundred thirty-one thousand, two hundred twelve".