121121121110999 has 4 divisors (see below), whose sum is σ = 121121167548000. Its totient is φ = 121121074674000.

The previous prime is 121121121110947. The next prime is 121121121111047. The reversal of 121121121110999 is 999011121121121.

It is a happy number.

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 121121121110999 - 2¹² = 121121121106903 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 (121121121110929) 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, 19057502 + ... + 24605499.

It is an arithmetic number, because the mean of its divisors is an integer number (30280291887000).

Almost surely, 2^{121121121110999} is an apocalyptic number.

121121121110999 is a deficient number, since it is larger than the sum of its proper divisors (46437001).

121121121110999 is an equidigital number, since it uses as much as digits as its factorization.

121121121110999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46437000.

The product of its (nonzero) digits is 5832, while the sum is 41.

The spelling of 121121121110999 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, nine hundred ninety-nine".