2251501121 has 4 divisors (see below), whose sum is σ = 2370001200. Its totient is φ = 2133001044.

The previous prime is 2251501117. The next prime is 2251501127. The reversal of 2251501121 is 1211051522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2251501121 - 2² = 2251501117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2251501093 and 2251501102.

It is not an unprimeable number, because it can be changed into a prime (2251501127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59250011 + ... + 59250048.

It is an arithmetic number, because the mean of its divisors is an integer number (592500300).

Almost surely, 2^2251501121 is an apocalyptic number.

It is an amenable number.

2251501121 is a deficient number, since it is larger than the sum of its proper divisors (118500079).

2251501121 is a wasteful number, since it uses less digits than its factorization.

2251501121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118500078.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 2251501121 is about 47449.9854689124. The cubic root of 2251501121 is about 1310.6620434289.

Adding to 2251501121 its reverse (1211051522), we get a palindrome (3462552643).

The spelling of 2251501121 in words is "two billion, two hundred fifty-one million, five hundred one thousand, one hundred twenty-one".