121711622677 has 2 divisors, whose sum is σ = 121711622678. Its totient is φ = 121711622676.

The previous prime is 121711622489. The next prime is 121711622699. The reversal of 121711622677 is 776226117121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120732621156 + 979001521 = 347466^2 + 31289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121711622677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121711622477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60855811338 + 60855811339.

It is an arithmetic number, because the mean of its divisors is an integer number (60855811339).

Almost surely, 2^121711622677 is an apocalyptic number.

It is an amenable number.

121711622677 is a deficient number, since it is larger than the sum of its proper divisors (1).

121711622677 is an equidigital number, since it uses as much as digits as its factorization.

121711622677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 43.

Adding to 121711622677 its reverse (776226117121), we get a palindrome (897937739798).

The spelling of 121711622677 in words is "one hundred twenty-one billion, seven hundred eleven million, six hundred twenty-two thousand, six hundred seventy-seven".