121222220099 has 2 divisors, whose sum is σ = 121222220100. Its totient is φ = 121222220098.

The previous prime is 121222220083. The next prime is 121222220111. The reversal of 121222220099 is 990022222121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121222220099 - 2⁴ = 121222220083 is a prime.

It is not a weakly prime, because it can be changed into another prime (121222220299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611110049 + 60611110050.

It is an arithmetic number, because the mean of its divisors is an integer number (60611110050).

Almost surely, 2^121222220099 is an apocalyptic number.

121222220099 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222220099 is an equidigital number, since it uses as much as digits as its factorization.

121222220099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

It can be divided in two parts, 1212222 and 20099, that added together give a palindrome (1232321).

The spelling of 121222220099 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, ninety-nine".