121200020111 has 8 divisors (see below), whose sum is σ = 123274690560. Its totient is φ = 119126030872.

The previous prime is 121200020069. The next prime is 121200020141. The reversal of 121200020111 is 111020002121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121200020111 - 2²⁶ = 121132911247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121200020092 and 121200020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200020141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195236 + ... + 529638.

It is an arithmetic number, because the mean of its divisors is an integer number (15409336320).

Almost surely, 2^121200020111 is an apocalyptic number.

121200020111 is a deficient number, since it is larger than the sum of its proper divisors (2074670449).

121200020111 is an equidigital number, since it uses as much as digits as its factorization.

121200020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340605.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121200020111 its reverse (111020002121), we get a palindrome (232220022232).

The spelling of 121200020111 in words is "one hundred twenty-one billion, two hundred million, twenty thousand, one hundred eleven".