31311000220112 has 10 divisors (see below), whose sum is σ = 60665062926498. Its totient is φ = 15655500110048.

The previous prime is 31311000220079. The next prime is 31311000220121. The reversal of 31311000220112 is 21102200011313.

It can be written as a sum of positive squares in only one way, i.e., 31145819752336 + 165180467776 = 5580844^2 + 406424^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978468756863 + ... + 978468756894.

Almost surely, 2^{31311000220112} is an apocalyptic number.

It is an amenable number.

31311000220112 is a deficient number, since it is larger than the sum of its proper divisors (29354062706386).

31311000220112 is a wasteful number, since it uses less digits than its factorization.

31311000220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956937513765 (or 1956937513759 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31311000220112 its reverse (21102200011313), we get a palindrome (52413200231425).

The spelling of 31311000220112 in words is "thirty-one trillion, three hundred eleven billion, two hundred twenty thousand, one hundred twelve".