1311621432342 has 64 divisors (see below), whose sum is σ = 2885450480640. Its totient is φ = 394946302464.

The previous prime is 1311621432311. The next prime is 1311621432349. The reversal of 1311621432342 is 2432341261131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311621432349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55487758 + ... + 55511390.

It is an arithmetic number, because the mean of its divisors is an integer number (45085163760).

Almost surely, 2^{1311621432342} is an apocalyptic number.

1311621432342 is an abundant number, since it is smaller than the sum of its proper divisors (1573829048298).

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

1311621432342 is a wasteful number, since it uses less digits than its factorization.

1311621432342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38837.

The product of its digits is 20736, while the sum is 33.

Adding to 1311621432342 its reverse (2432341261131), we get a palindrome (3743962693473).

The spelling of 1311621432342 in words is "one trillion, three hundred eleven billion, six hundred twenty-one million, four hundred thirty-two thousand, three hundred forty-two".