121200000221111 has 8 divisors (see below), whose sum is σ = 138733801480704. Its totient is φ = 103721077839960.

The previous prime is 121200000221081. The next prime is 121200000221117. The reversal of 121200000221111 is 111122000002121.

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

It is not a de Polignac number, because 121200000221111 - 2¹⁰ = 121200000220087 is a prime.

It is a super-4 number, since 4×121200000221111⁴ (a number of 57 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200000221117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13719714875 + ... + 13719723708.

It is an arithmetic number, because the mean of its divisors is an integer number (17341725185088).

Almost surely, 2^{121200000221111} is an apocalyptic number.

121200000221111 is a deficient number, since it is larger than the sum of its proper divisors (17533801259593).

121200000221111 is an equidigital number, since it uses as much as digits as its factorization.

121200000221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27439439221.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121200000221111 its reverse (111122000002121), we get a palindrome (232322000223232).

The spelling of 121200000221111 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twenty-one thousand, one hundred eleven".