31431222021242 has 16 divisors (see below), whose sum is σ = 48703300572672. Its totient is φ = 15197530204560.

The previous prime is 31431222021239. The next prime is 31431222021259. The reversal of 31431222021242 is 24212022213413.

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, 185341433 + ... + 185510940.

It is an arithmetic number, because the mean of its divisors is an integer number (3043956285792).

Almost surely, 2^{31431222021242} is an apocalyptic number.

31431222021242 is a deficient number, since it is larger than the sum of its proper divisors (17272078551430).

31431222021242 is a wasteful number, since it uses less digits than its factorization.

31431222021242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370853773.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 31431222021242 its reverse (24212022213413), we get a palindrome (55643244234655).

The spelling of 31431222021242 in words is "thirty-one trillion, four hundred thirty-one billion, two hundred twenty-two million, twenty-one thousand, two hundred forty-two".