31113223012 has 6 divisors (see below), whose sum is σ = 54448140278. Its totient is φ = 15556611504.

The previous prime is 31113222971. The next prime is 31113223019. The reversal of 31113223012 is 21032231113.

It can be written as a sum of positive squares in only one way, i.e., 17164668196 + 13948554816 = 131014^2 + 118104^2 .

It is not an unprimeable number, because it can be changed into a prime (31113223019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3889152873 + ... + 3889152880.

Almost surely, 2^31113223012 is an apocalyptic number.

It is an amenable number.

31113223012 is a deficient number, since it is larger than the sum of its proper divisors (23334917266).

31113223012 is a wasteful number, since it uses less digits than its factorization.

31113223012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7778305757 (or 7778305755 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31113223012 its reverse (21032231113), we get a palindrome (52145454125).

The spelling of 31113223012 in words is "thirty-one billion, one hundred thirteen million, two hundred twenty-three thousand, twelve".