31120220204 has 12 divisors (see below), whose sum is σ = 54857907384. Its totient is φ = 15446532384.

The previous prime is 31120220203. The next prime is 31120220237. The reversal of 31120220204 is 40202202113.

It is not an unprimeable number, because it can be changed into a prime (31120220203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28393814 + ... + 28394909.

It is an arithmetic number, because the mean of its divisors is an integer number (4571492282).

Almost surely, 2^31120220204 is an apocalyptic number.

It is an amenable number.

31120220204 is a deficient number, since it is larger than the sum of its proper divisors (23737687180).

31120220204 is a wasteful number, since it uses less digits than its factorization.

31120220204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56788864 (or 56788862 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 31120220204 its reverse (40202202113), we get a palindrome (71322422317).

The spelling of 31120220204 in words is "thirty-one billion, one hundred twenty million, two hundred twenty thousand, two hundred four".