77111122117 has 2 divisors, whose sum is σ = 77111122118. Its totient is φ = 77111122116.

The previous prime is 77111122051. The next prime is 77111122141. The reversal of 77111122117 is 71122111177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76325665441 + 785456676 = 276271^2 + 28026^2 .

It is a cyclic number.

It is not a de Polignac number, because 77111122117 - 2¹¹ = 77111120069 is a prime.

It is a super-2 number, since 2×77111122117² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77111120117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38555561058 + 38555561059.

It is an arithmetic number, because the mean of its divisors is an integer number (38555561059).

Almost surely, 2^77111122117 is an apocalyptic number.

It is an amenable number.

77111122117 is a deficient number, since it is larger than the sum of its proper divisors (1).

77111122117 is an equidigital number, since it uses as much as digits as its factorization.

77111122117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1372, while the sum is 31.

The spelling of 77111122117 in words is "seventy-seven billion, one hundred eleven million, one hundred twenty-two thousand, one hundred seventeen".