31102120144 has 20 divisors (see below), whose sum is σ = 60268303296. Its totient is φ = 15549009632.

The previous prime is 31102120123. The next prime is 31102120151. The reversal of 31102120144 is 44102120113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927 + ... + 249409.

Almost surely, 2^31102120144 is an apocalyptic number.

It is an amenable number.

31102120144 is a deficient number, since it is larger than the sum of its proper divisors (29166183152).

31102120144 is a wasteful number, since it uses less digits than its factorization.

31102120144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256314 (or 256308 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31102120144 its reverse (44102120113), we get a palindrome (75204240257).

The spelling of 31102120144 in words is "thirty-one billion, one hundred two million, one hundred twenty thousand, one hundred forty-four".