31411121977 has 2 divisors, whose sum is σ = 31411121978. Its totient is φ = 31411121976.

The previous prime is 31411121971. The next prime is 31411122019. The reversal of 31411121977 is 77912111413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31379996736 + 31125241 = 177144^2 + 5579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31411121977 is a prime.

It is not a weakly prime, because it can be changed into another prime (31411121971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15705560988 + 15705560989.

It is an arithmetic number, because the mean of its divisors is an integer number (15705560989).

Almost surely, 2^31411121977 is an apocalyptic number.

It is an amenable number.

31411121977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31411121977 is an equidigital number, since it uses as much as digits as its factorization.

31411121977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 37.

The spelling of 31411121977 in words is "thirty-one billion, four hundred eleven million, one hundred twenty-one thousand, nine hundred seventy-seven".