1231342230542 has 16 divisors (see below), whose sum is σ = 1944579753600. Its totient is φ = 583160818680.

The previous prime is 1231342230497. The next prime is 1231342230577. The reversal of 1231342230542 is 2450322431321.

It is a super-2 number, since 2×1231342230542² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231342230499 and 1231342230508.

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, 2748884 + ... + 3165287.

It is an arithmetic number, because the mean of its divisors is an integer number (121536234600).

Almost surely, 2^{1231342230542} is an apocalyptic number.

1231342230542 is a deficient number, since it is larger than the sum of its proper divisors (713237523058).

1231342230542 is a wasteful number, since it uses less digits than its factorization.

1231342230542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919671.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 1231342230542 its reverse (2450322431321), we get a palindrome (3681664661863).

The spelling of 1231342230542 in words is "one trillion, two hundred thirty-one billion, three hundred forty-two million, two hundred thirty thousand, five hundred forty-two".