121111102099999 has 4 divisors (see below), whose sum is σ = 132121202290920. Its totient is φ = 110101001909080.

The previous prime is 121111102099993. The next prime is 121111102100017. The reversal of 121111102099999 is 999990201111121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121111102099999 - 2⁹ = 121111102099487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111102099993) 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, 5505050095444 + ... + 5505050095465.

It is an arithmetic number, because the mean of its divisors is an integer number (33030300572730).

Almost surely, 2^{121111102099999} is an apocalyptic number.

121111102099999 is a deficient number, since it is larger than the sum of its proper divisors (11010100190921).

121111102099999 is a wasteful number, since it uses less digits than its factorization.

121111102099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11010100190920.

The product of its (nonzero) digits is 236196, while the sum is 55.

The spelling of 121111102099999 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred two million, ninety-nine thousand, nine hundred ninety-nine".