2251121212274 has 32 divisors (see below), whose sum is σ = 3726074753280. Its totient is φ = 1011496636800.

The previous prime is 2251121212271. The next prime is 2251121212279. The reversal of 2251121212274 is 4722121211522.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2251121212274.

It is not an unprimeable number, because it can be changed into a prime (2251121212271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55499 + ... + 2122574.

It is an arithmetic number, because the mean of its divisors is an integer number (116439836040).

Almost surely, 2^{2251121212274} is an apocalyptic number.

2251121212274 is a deficient number, since it is larger than the sum of its proper divisors (1474953541006).

2251121212274 is a wasteful number, since it uses less digits than its factorization.

2251121212274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178626.

The product of its digits is 8960, while the sum is 32.

Adding to 2251121212274 its reverse (4722121211522), we get a palindrome (6973242423796).

The spelling of 2251121212274 in words is "two trillion, two hundred fifty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred seventy-four".