121220332477 has 2 divisors, whose sum is σ = 121220332478. Its totient is φ = 121220332476.

The previous prime is 121220332361. The next prime is 121220332483. The reversal of 121220332477 is 774233022121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67547490201 + 53672842276 = 259899^2 + 231674^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220332477 - 2⁷ = 121220332349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220332487) 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, 60610166238 + 60610166239.

It is an arithmetic number, because the mean of its divisors is an integer number (60610166239).

Almost surely, 2^121220332477 is an apocalyptic number.

It is an amenable number.

121220332477 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220332477 is an equidigital number, since it uses as much as digits as its factorization.

121220332477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

Adding to 121220332477 its reverse (774233022121), we get a palindrome (895453354598).

The spelling of 121220332477 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred thirty-two thousand, four hundred seventy-seven".