121020222077 has 2 divisors, whose sum is σ = 121020222078. Its totient is φ = 121020222076.

The previous prime is 121020222031. The next prime is 121020222079. The reversal of 121020222077 is 770222020121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92225186596 + 28795035481 = 303686^2 + 169691^2 .

It is a cyclic number.

It is not a de Polignac number, because 121020222077 - 2¹⁰ = 121020221053 is a prime.

Together with 121020222079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121020222079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510111038 + 60510111039.

It is an arithmetic number, because the mean of its divisors is an integer number (60510111039).

Almost surely, 2^121020222077 is an apocalyptic number.

It is an amenable number.

121020222077 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020222077 is an equidigital number, since it uses as much as digits as its factorization.

121020222077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 26.

Adding to 121020222077 its reverse (770222020121), we get a palindrome (891242242198).

The spelling of 121020222077 in words is "one hundred twenty-one billion, twenty million, two hundred twenty-two thousand, seventy-seven".