31120144111 has 16 divisors (see below), whose sum is σ = 35698637824. Its totient is φ = 26574990624.

The previous prime is 31120144073. The next prime is 31120144141. The reversal of 31120144111 is 11144102113.

It is not a de Polignac number, because 31120144111 - 2²¹ = 31118046959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120144141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2802376 + ... + 2813458.

It is an arithmetic number, because the mean of its divisors is an integer number (2231164864).

Almost surely, 2^31120144111 is an apocalyptic number.

31120144111 is a deficient number, since it is larger than the sum of its proper divisors (4578493713).

31120144111 is a wasteful number, since it uses less digits than its factorization.

31120144111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12550.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 31120144111 its reverse (11144102113), we get a palindrome (42264246224).

The spelling of 31120144111 in words is "thirty-one billion, one hundred twenty million, one hundred forty-four thousand, one hundred eleven".