121212222199 has 2 divisors, whose sum is σ = 121212222200. Its totient is φ = 121212222198.

The previous prime is 121212222193. The next prime is 121212222211. The reversal of 121212222199 is 991222212121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121212222199 - 2⁷ = 121212222071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212222193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606111099 + 60606111100.

It is an arithmetic number, because the mean of its divisors is an integer number (60606111100).

Almost surely, 2^121212222199 is an apocalyptic number.

121212222199 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212222199 is an equidigital number, since it uses as much as digits as its factorization.

121212222199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

It can be divided in two parts, 1212122 and 22199, that added together give a palindrome (1234321).

The spelling of 121212222199 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred ninety-nine".