31189840111 has 2 divisors, whose sum is σ = 31189840112. Its totient is φ = 31189840110.

The previous prime is 31189839983. The next prime is 31189840159. The reversal of 31189840111 is 11104898113.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31189840111 - 2⁷ = 31189839983 is a prime.

It is a super-2 number, since 2×31189840111² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31189840711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15594920055 + 15594920056.

It is an arithmetic number, because the mean of its divisors is an integer number (15594920056).

Almost surely, 2^31189840111 is an apocalyptic number.

31189840111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31189840111 is an equidigital number, since it uses as much as digits as its factorization.

31189840111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 37.

The spelling of 31189840111 in words is "thirty-one billion, one hundred eighty-nine million, eight hundred forty thousand, one hundred eleven".