2123121413 has 8 divisors (see below), whose sum is σ = 2442710400. Its totient is φ = 1807603920.

The previous prime is 2123121391. The next prime is 2123121419. The reversal of 2123121413 is 3141213212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2123121413 - 2⁸ = 2123121157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123121419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016753 + ... + 1018838.

It is an arithmetic number, because the mean of its divisors is an integer number (305338800).

Almost surely, 2^2123121413 is an apocalyptic number.

It is an amenable number.

2123121413 is a deficient number, since it is larger than the sum of its proper divisors (319588987).

2123121413 is a wasteful number, since it uses less digits than its factorization.

2123121413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035747.

The product of its digits is 288, while the sum is 20.

The square root of 2123121413 is about 46077.3416442399. The cubic root of 2123121413 is about 1285.2618306008.

Adding to 2123121413 its reverse (3141213212), we get a palindrome (5264334625).

The spelling of 2123121413 in words is "two billion, one hundred twenty-three million, one hundred twenty-one thousand, four hundred thirteen".