121201120221121 has 2 divisors, whose sum is σ = 121201120221122. Its totient is φ = 121201120221120.

The previous prime is 121201120221067. The next prime is 121201120221149. The reversal of 121201120221121 is 121122021102121.

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., 97369529760000 + 23831590461121 = 9867600^2 + 4881761^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201120221121 - 2⁴³ = 112405027198913 is a prime.

It is not a weakly prime, because it can be changed into another prime (121201120281121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600560110560 + 60600560110561.

It is an arithmetic number, because the mean of its divisors is an integer number (60600560110561).

Almost surely, 2^{121201120221121} is an apocalyptic number.

It is an amenable number.

121201120221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201120221121 is an equidigital number, since it uses as much as digits as its factorization.

121201120221121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121201120221121 its reverse (121122021102121), we get a palindrome (242323141323242).

The spelling of 121201120221121 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".