2121312344 has 16 divisors (see below), whose sum is σ = 4007824920. Its totient is φ = 1052559040.

The previous prime is 2121312331. The next prime is 2121312359. The reversal of 2121312344 is 4432131212.

It is a super-3 number, since 3×2121312344³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011029 + ... + 1013124.

Almost surely, 2^2121312344 is an apocalyptic number.

It is an amenable number.

2121312344 is a deficient number, since it is larger than the sum of its proper divisors (1886512576).

2121312344 is a wasteful number, since it uses less digits than its factorization.

2121312344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024290 (or 2024286 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 2121312344 is about 46057.7066732594. The cubic root of 2121312344 is about 1284.8966782939.

Adding to 2121312344 its reverse (4432131212), we get a palindrome (6553443556).

The spelling of 2121312344 in words is "two billion, one hundred twenty-one million, three hundred twelve thousand, three hundred forty-four".