251313402121322 has 16 divisors (see below), whose sum is σ = 377041200580800. Its totient is φ = 125633002730400.

The previous prime is 251313402121321. The next prime is 251313402121399. The reversal of 251313402121322 is 223121204313152.

It is a super-3 number, since 3×251313402121322³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (251313402121321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759413129 + ... + 759743987.

It is an arithmetic number, because the mean of its divisors is an integer number (23565075036300).

Almost surely, 2^{251313402121322} is an apocalyptic number.

251313402121322 is a deficient number, since it is larger than the sum of its proper divisors (125727798459478).

251313402121322 is a wasteful number, since it uses less digits than its factorization.

251313402121322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401341.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 251313402121322 its reverse (223121204313152), we get a palindrome (474434606434474).

The spelling of 251313402121322 in words is "two hundred fifty-one trillion, three hundred thirteen billion, four hundred two million, one hundred twenty-one thousand, three hundred twenty-two".