251341044121 has 4 divisors (see below), whose sum is σ = 251353020672. Its totient is φ = 251329067572.

The previous prime is 251341044079. The next prime is 251341044139. The reversal of 251341044121 is 121440143152.

It is a happy number.

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 251341044121 - 2²⁵ = 251307489689 is a prime.

It is a super-3 number, since 3×251341044121³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 251341044121.

It is not an unprimeable number, because it can be changed into a prime (251341044221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5956741 + ... + 5998786.

It is an arithmetic number, because the mean of its divisors is an integer number (62838255168).

Almost surely, 2^251341044121 is an apocalyptic number.

It is an amenable number.

251341044121 is a deficient number, since it is larger than the sum of its proper divisors (11976551).

251341044121 is a wasteful number, since it uses less digits than its factorization.

251341044121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11976550.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 251341044121 its reverse (121440143152), we get a palindrome (372781187273).

The spelling of 251341044121 in words is "two hundred fifty-one billion, three hundred forty-one million, forty-four thousand, one hundred twenty-one".