121121010077 has 2 divisors, whose sum is σ = 121121010078. Its totient is φ = 121121010076.

The previous prime is 121121010029. The next prime is 121121010103. The reversal of 121121010077 is 770010121121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114290648761 + 6830361316 = 338069^2 + 82646^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121010077 - 2²⁴ = 121104232861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121121010277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560505038 + 60560505039.

It is an arithmetic number, because the mean of its divisors is an integer number (60560505039).

Almost surely, 2^121121010077 is an apocalyptic number.

It is an amenable number.

121121010077 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121010077 is an equidigital number, since it uses as much as digits as its factorization.

121121010077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196, while the sum is 23.

Adding to 121121010077 its reverse (770010121121), we get a palindrome (891131131198).

The spelling of 121121010077 in words is "one hundred twenty-one billion, one hundred twenty-one million, ten thousand, seventy-seven".