2121411251 has 8 divisors (see below), whose sum is σ = 2190835584. Its totient is φ = 2052048960.

The previous prime is 2121411241. The next prime is 2121411269. The reversal of 2121411251 is 1521141212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121411251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121411241) 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, 59885 + ... + 88481.

It is an arithmetic number, because the mean of its divisors is an integer number (273854448).

Almost surely, 2^2121411251 is an apocalyptic number.

2121411251 is a deficient number, since it is larger than the sum of its proper divisors (69424333).

2121411251 is a wasteful number, since it uses less digits than its factorization.

2121411251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31021.

The product of its digits is 160, while the sum is 20.

The square root of 2121411251 is about 46058.7803898453. The cubic root of 2121411251 is about 1284.9166475834.

Adding to 2121411251 its reverse (1521141212), we get a palindrome (3642552463).

The spelling of 2121411251 in words is "two billion, one hundred twenty-one million, four hundred eleven thousand, two hundred fifty-one".