31011120143 has 2 divisors, whose sum is σ = 31011120144. Its totient is φ = 31011120142.

The previous prime is 31011120131. The next prime is 31011120169. The reversal of 31011120143 is 34102111013.

It is a weak prime.

It is an emirp because it is prime and its reverse (34102111013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31011120143 - 2⁶ = 31011120079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31011120193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15505560071 + 15505560072.

It is an arithmetic number, because the mean of its divisors is an integer number (15505560072).

Almost surely, 2^31011120143 is an apocalyptic number.

31011120143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31011120143 is an equidigital number, since it uses as much as digits as its factorization.

31011120143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31011120143 its reverse (34102111013), we get a palindrome (65113231156).

The spelling of 31011120143 in words is "thirty-one billion, eleven million, one hundred twenty thousand, one hundred forty-three".