121220221043 has 2 divisors, whose sum is σ = 121220221044. Its totient is φ = 121220221042.

The previous prime is 121220221021. The next prime is 121220221049. The reversal of 121220221043 is 340122022121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121220221043 - 2⁸ = 121220220787 is a prime.

It is not a weakly prime, because it can be changed into another prime (121220221049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610110521 + 60610110522.

It is an arithmetic number, because the mean of its divisors is an integer number (60610110522).

Almost surely, 2^121220221043 is an apocalyptic number.

121220221043 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220221043 is an equidigital number, since it uses as much as digits as its factorization.

121220221043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 121220221043 its reverse (340122022121), we get a palindrome (461342243164).

The spelling of 121220221043 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, forty-three".