121100320111 has 4 divisors (see below), whose sum is σ = 121113623800. Its totient is φ = 121087016424.

The previous prime is 121100320073. The next prime is 121100320129. The reversal of 121100320111 is 111023001121.

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 121100320111 - 2⁷ = 121100319983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121100320091 and 121100320100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100323111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6638181 + ... + 6656398.

It is an arithmetic number, because the mean of its divisors is an integer number (30278405950).

Almost surely, 2^121100320111 is an apocalyptic number.

121100320111 is a deficient number, since it is larger than the sum of its proper divisors (13303689).

121100320111 is an equidigital number, since it uses as much as digits as its factorization.

121100320111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13303688.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121100320111 its reverse (111023001121), we get a palindrome (232123321232).

The spelling of 121100320111 in words is "one hundred twenty-one billion, one hundred million, three hundred twenty thousand, one hundred eleven".