31021243042 has 16 divisors (see below), whose sum is σ = 46896220800. Its totient is φ = 15389215920.

The previous prime is 31021242979. The next prime is 31021243049. The reversal of 31021243042 is 24034212013.

It is not an unprimeable number, because it can be changed into a prime (31021243049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2001559 + ... + 2016997.

It is an arithmetic number, because the mean of its divisors is an integer number (2931013800).

Almost surely, 2^31021243042 is an apocalyptic number.

31021243042 is a deficient number, since it is larger than the sum of its proper divisors (15874977758).

31021243042 is a wasteful number, since it uses less digits than its factorization.

31021243042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23241.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31021243042 its reverse (24034212013), we get a palindrome (55055455055).

The spelling of 31021243042 in words is "thirty-one billion, twenty-one million, two hundred forty-three thousand, forty-two".