2121103251 has 12 divisors (see below), whose sum is σ = 3076638240. Its totient is φ = 1408150800.

The previous prime is 2121103249. The next prime is 2121103261. The reversal of 2121103251 is 1523011212.

It is not a de Polignac number, because 2121103251 - 2¹ = 2121103249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121103241) 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, 490900 + ... + 495201.

It is an arithmetic number, because the mean of its divisors is an integer number (256386520).

Almost surely, 2^2121103251 is an apocalyptic number.

2121103251 is a deficient number, since it is larger than the sum of its proper divisors (955534989).

2121103251 is a wasteful number, since it uses less digits than its factorization.

2121103251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986346 (or 986343 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 2121103251 is about 46055.4367148983. The cubic root of 2121103251 is about 1284.8544604455.

Adding to 2121103251 its reverse (1523011212), we get a palindrome (3644114463).

The spelling of 2121103251 in words is "two billion, one hundred twenty-one million, one hundred three thousand, two hundred fifty-one".