251121313330 has 16 divisors (see below), whose sum is σ = 453471804864. Its totient is φ = 100125538480.

The previous prime is 251121313271. The next prime is 251121313451. The reversal of 251121313330 is 33313121152.

It is a junction number, because it is equal to n+sod(n) for n = 251121313295 and 251121313304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40370092 + ... + 40376311.

It is an arithmetic number, because the mean of its divisors is an integer number (28341987804).

Almost surely, 2^251121313330 is an apocalyptic number.

251121313330 is a deficient number, since it is larger than the sum of its proper divisors (202350491534).

251121313330 is a wasteful number, since it uses less digits than its factorization.

251121313330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80746721.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 251121313330 its reverse (33313121152), we get a palindrome (284434434482).

The spelling of 251121313330 in words is "two hundred fifty-one billion, one hundred twenty-one million, three hundred thirteen thousand, three hundred thirty".