31144142111 has 4 divisors (see below), whose sum is σ = 31153814424. Its totient is φ = 31134469800.

The previous prime is 31144142093. The next prime is 31144142129. The reversal of 31144142111 is 11124144113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11124144113 = 1879 ⋅5920247.

It is an interprime number because it is at equal distance from previous prime (31144142093) and next prime (31144142129).

It is a cyclic number.

It is not a de Polignac number, because 31144142111 - 2³⁰ = 30070400287 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 (31144145111) 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, 4831325 + ... + 4837766.

It is an arithmetic number, because the mean of its divisors is an integer number (7788453606).

Almost surely, 2^31144142111 is an apocalyptic number.

31144142111 is a deficient number, since it is larger than the sum of its proper divisors (9672313).

31144142111 is an equidigital number, since it uses as much as digits as its factorization.

31144142111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9672312.

The product of its digits is 384, while the sum is 23.

Adding to 31144142111 its reverse (11124144113), we get a palindrome (42268286224).

The spelling of 31144142111 in words is "thirty-one billion, one hundred forty-four million, one hundred forty-two thousand, one hundred eleven".