1251312312342 has 16 divisors (see below), whose sum is σ = 2502638695872. Its totient is φ = 417101758920.

The previous prime is 1251312312337. The next prime is 1251312312401. The reversal of 1251312312342 is 2432132131521.

It is a congruent number.

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, 834673 + ... + 1788659.

It is an arithmetic number, because the mean of its divisors is an integer number (156414918492).

Almost surely, 2^{1251312312342} is an apocalyptic number.

1251312312342 is an abundant number, since it is smaller than the sum of its proper divisors (1251326383530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251312312342 is a wasteful number, since it uses less digits than its factorization.

1251312312342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172603.

The product of its digits is 8640, while the sum is 30.

Adding to 1251312312342 its reverse (2432132131521), we get a palindrome (3683444443863).

The spelling of 1251312312342 in words is "one trillion, two hundred fifty-one billion, three hundred twelve million, three hundred twelve thousand, three hundred forty-two".