31321112012143 has 2 divisors, whose sum is σ = 31321112012144. Its totient is φ = 31321112012142.

The previous prime is 31321112012129. The next prime is 31321112012149. The reversal of 31321112012143 is 34121021112313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31321112012143 - 2⁴¹ = 29122088756591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321112012149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660556006071 + 15660556006072.

It is an arithmetic number, because the mean of its divisors is an integer number (15660556006072).

Almost surely, 2^{31321112012143} is an apocalyptic number.

31321112012143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321112012143 is an equidigital number, since it uses as much as digits as its factorization.

31321112012143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 31321112012143 its reverse (34121021112313), we get a palindrome (65442133124456).

The spelling of 31321112012143 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred twelve million, twelve thousand, one hundred forty-three".