121000111222211 has 4 divisors (see below), whose sum is σ = 130307812085472. Its totient is φ = 111692410358952.

The previous prime is 121000111222187. The next prime is 121000111222217. The reversal of 121000111222211 is 112222111000121.

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 121000111222211 - 2⁶ = 121000111222147 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 121000111222211.

It is not an unprimeable number, because it can be changed into a prime (121000111222217) 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, 4653850431611 + ... + 4653850431636.

It is an arithmetic number, because the mean of its divisors is an integer number (32576953021368).

Almost surely, 2^{121000111222211} is an apocalyptic number.

121000111222211 is a deficient number, since it is larger than the sum of its proper divisors (9307700863261).

121000111222211 is an equidigital number, since it uses as much as digits as its factorization.

121000111222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9307700863260.

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

Adding to 121000111222211 its reverse (112222111000121), we get a palindrome (233222222222332).

The spelling of 121000111222211 in words is "one hundred twenty-one trillion, one hundred eleven million, two hundred twenty-two thousand, two hundred eleven".