121220022121157 has 2 divisors, whose sum is σ = 121220022121158. Its totient is φ = 121220022121156.

The previous prime is 121220022121049. The next prime is 121220022121241. The reversal of 121220022121157 is 751121220022121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75718643109316 + 45501379011841 = 8701646^2 + 6745471^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220022121157 - 2¹⁶ = 121220022055621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220022121357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610011060578 + 60610011060579.

It is an arithmetic number, because the mean of its divisors is an integer number (60610011060579).

Almost surely, 2^{121220022121157} is an apocalyptic number.

It is an amenable number.

121220022121157 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220022121157 is an equidigital number, since it uses as much as digits as its factorization.

121220022121157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 29.

Adding to 121220022121157 its reverse (751121220022121), we get a palindrome (872341242143278).

The spelling of 121220022121157 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-two million, one hundred twenty-one thousand, one hundred fifty-seven".