31121013142 has 16 divisors (see below), whose sum is σ = 47024656272. Its totient is φ = 15446485600.

The previous prime is 31121013109. The next prime is 31121013179. The reversal of 31121013142 is 24131012113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85392 + ... + 263692.

It is an arithmetic number, because the mean of its divisors is an integer number (2939041017).

Almost surely, 2^31121013142 is an apocalyptic number.

31121013142 is a deficient number, since it is larger than the sum of its proper divisors (15903643130).

31121013142 is a wasteful number, since it uses less digits than its factorization.

31121013142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178943.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31121013142 its reverse (24131012113), we get a palindrome (55252025255).

The spelling of 31121013142 in words is "thirty-one billion, one hundred twenty-one million, thirteen thousand, one hundred forty-two".