121223102099 has 12 divisors (see below), whose sum is σ = 133388780280. Its totient is φ = 110084092800.

The previous prime is 121223102089. The next prime is 121223102171. The reversal of 121223102099 is 990201322121.

It is a happy number.

It is not a de Polignac number, because 121223102099 - 2³² = 116928134803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121223102089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426797 + ... + 651614.

It is an arithmetic number, because the mean of its divisors is an integer number (11115731690).

Almost surely, 2^121223102099 is an apocalyptic number.

121223102099 is a deficient number, since it is larger than the sum of its proper divisors (12165678181).

121223102099 is a wasteful number, since it uses less digits than its factorization.

121223102099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079362 (or 1079351 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

It can be divided in two parts, 121223 and 102099, that added together give a palindrome (223322).

The spelling of 121223102099 in words is "one hundred twenty-one billion, two hundred twenty-three million, one hundred two thousand, ninety-nine".