2121112323 has 12 divisors (see below), whose sum is σ = 3342358968. Its totient is φ = 1285522560.

The previous prime is 2121112319. The next prime is 2121112337. The reversal of 2121112323 is 3232111212.

It is not a de Polignac number, because 2121112323 - 2² = 2121112319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121112296 and 2121112305.

It is not an unprimeable number, because it can be changed into a prime (2121112373) 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, 10712590 + ... + 10712787.

It is an arithmetic number, because the mean of its divisors is an integer number (278529914).

Almost surely, 2^2121112323 is an apocalyptic number.

2121112323 is a deficient number, since it is larger than the sum of its proper divisors (1221246645).

2121112323 is a wasteful number, since it uses less digits than its factorization.

2121112323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21425394 (or 21425391 counting only the distinct ones).

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

The square root of 2121112323 is about 46055.5352047938. The cubic root of 2121112323 is about 1284.8562922254.

Adding to 2121112323 its reverse (3232111212), we get a palindrome (5353223535).

The spelling of 2121112323 in words is "two billion, one hundred twenty-one million, one hundred twelve thousand, three hundred twenty-three".