121200202211111 has 4 divisors (see below), whose sum is σ = 121200728500032. Its totient is φ = 121199675922192.

The previous prime is 121200202211059. The next prime is 121200202211149. The reversal of 121200202211111 is 111112202002121.

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 121200202211111 - 2¹⁸ = 121200201948967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121200202211111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200202211161) 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, 262798871 + ... + 263259656.

It is an arithmetic number, because the mean of its divisors is an integer number (30300182125008).

Almost surely, 2^{121200202211111} is an apocalyptic number.

121200202211111 is a deficient number, since it is larger than the sum of its proper divisors (526288921).

121200202211111 is an equidigital number, since it uses as much as digits as its factorization.

121200202211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526288920.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121200202211111 its reverse (111112202002121), we get a palindrome (232312404213232).

The spelling of 121200202211111 in words is "one hundred twenty-one trillion, two hundred billion, two hundred two million, two hundred eleven thousand, one hundred eleven".