31120402111 has 2 divisors, whose sum is σ = 31120402112. Its totient is φ = 31120402110.

The previous prime is 31120402099. The next prime is 31120402121. The reversal of 31120402111 is 11120402113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31120402111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31120402121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560201055 + 15560201056.

It is an arithmetic number, because the mean of its divisors is an integer number (15560201056).

Almost surely, 2^31120402111 is an apocalyptic number.

31120402111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120402111 is an equidigital number, since it uses as much as digits as its factorization.

31120402111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31120402111 its reverse (11120402113), we get a palindrome (42240804224).

The spelling of 31120402111 in words is "thirty-one billion, one hundred twenty million, four hundred two thousand, one hundred eleven".