31111332142 has 16 divisors (see below), whose sum is σ = 50919282864. Its totient is φ = 14138784000.

The previous prime is 31111332097. The next prime is 31111332143. The reversal of 31111332142 is 24123311113.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111332143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17709 + ... + 250072.

It is an arithmetic number, because the mean of its divisors is an integer number (3182455179).

Almost surely, 2^31111332142 is an apocalyptic number.

31111332142 is a deficient number, since it is larger than the sum of its proper divisors (19807950722).

31111332142 is a wasteful number, since it uses less digits than its factorization.

31111332142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273075.

The product of its digits is 432, while the sum is 22.

Adding to 31111332142 its reverse (24123311113), we get a palindrome (55234643255).

The spelling of 31111332142 in words is "thirty-one billion, one hundred eleven million, three hundred thirty-two thousand, one hundred forty-two".