1251423341231 has 16 divisors (see below), whose sum is σ = 1444983481344. Its totient is φ = 1061572526784.

The previous prime is 1251423341219. The next prime is 1251423341263. The reversal of 1251423341231 is 1321433241521.

It is a happy number.

It is not a de Polignac number, because 1251423341231 - 2²² = 1251419146927 is a prime.

It is a super-2 number, since 2×1251423341231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251423341731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618611 + ... + 1698683.

It is an arithmetic number, because the mean of its divisors is an integer number (90311467584).

Almost surely, 2^{1251423341231} is an apocalyptic number.

1251423341231 is a deficient number, since it is larger than the sum of its proper divisors (193560140113).

1251423341231 is a wasteful number, since it uses less digits than its factorization.

1251423341231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081790.

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

Adding to 1251423341231 its reverse (1321433241521), we get a palindrome (2572856582752).

The spelling of 1251423341231 in words is "one trillion, two hundred fifty-one billion, four hundred twenty-three million, three hundred forty-one thousand, two hundred thirty-one".