1142142123431 has 4 divisors (see below), whose sum is σ = 1142164590864. Its totient is φ = 1142119656000.

The previous prime is 1142142123391. The next prime is 1142142123461. The reversal of 1142142123431 is 1343212412411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1142142123431 - 2³⁸ = 867264216487 is a prime.

It is a super-2 number, since 2×1142142123431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1142142123394 and 1142142123403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142142123461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11157290 + ... + 11259191.

It is an arithmetic number, because the mean of its divisors is an integer number (285541147716).

Almost surely, 2^{1142142123431} is an apocalyptic number.

1142142123431 is a deficient number, since it is larger than the sum of its proper divisors (22467433).

1142142123431 is an equidigital number, since it uses as much as digits as its factorization.

1142142123431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22467432.

The product of its digits is 4608, while the sum is 29.

Adding to 1142142123431 its reverse (1343212412411), we get a palindrome (2485354535842).

The spelling of 1142142123431 in words is "one trillion, one hundred forty-two billion, one hundred forty-two million, one hundred twenty-three thousand, four hundred thirty-one".