121520480077 has 2 divisors, whose sum is σ = 121520480078. Its totient is φ = 121520480076.

The previous prime is 121520480069. The next prime is 121520480083. The reversal of 121520480077 is 770084025121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90203514921 + 31316965156 = 300339^2 + 176966^2 .

It is an emirp because it is prime and its reverse (770084025121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121520480077 - 2³ = 121520480069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121520480057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60760240038 + 60760240039.

It is an arithmetic number, because the mean of its divisors is an integer number (60760240039).

Almost surely, 2^121520480077 is an apocalyptic number.

It is an amenable number.

121520480077 is a deficient number, since it is larger than the sum of its proper divisors (1).

121520480077 is an equidigital number, since it uses as much as digits as its factorization.

121520480077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 37.

The spelling of 121520480077 in words is "one hundred twenty-one billion, five hundred twenty million, four hundred eighty thousand, seventy-seven".