31111242430142 has 32 divisors (see below), whose sum is σ = 58926079936512. Its totient is φ = 12003460723584.

The previous prime is 31111242430039. The next prime is 31111242430157. The reversal of 31111242430142 is 24103424211113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2841722918 + ... + 2841733865.

It is an arithmetic number, because the mean of its divisors is an integer number (1841439998016).

Almost surely, 2^{31111242430142} is an apocalyptic number.

31111242430142 is a deficient number, since it is larger than the sum of its proper divisors (27814837506370).

31111242430142 is a wasteful number, since it uses less digits than its factorization.

31111242430142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683456832.

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

Adding to 31111242430142 its reverse (24103424211113), we get a palindrome (55214666641255).

The spelling of 31111242430142 in words is "thirty-one trillion, one hundred eleven billion, two hundred forty-two million, four hundred thirty thousand, one hundred forty-two".