121212122099 has 4 divisors (see below), whose sum is σ = 121213010736. Its totient is φ = 121211233464.

The previous prime is 121212122089. The next prime is 121212122107. The reversal of 121212122099 is 990221212121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121212122099 - 2³² = 116917154803 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (121212122029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191924 + ... + 528449.

It is an arithmetic number, because the mean of its divisors is an integer number (30303252684).

Almost surely, 2^121212122099 is an apocalyptic number.

121212122099 is a deficient number, since it is larger than the sum of its proper divisors (888637).

121212122099 is an equidigital number, since it uses as much as digits as its factorization.

121212122099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888636.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 121212122099 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, ninety-nine".