111012120121 has 16 divisors (see below), whose sum is σ = 134607657600. Its totient is φ = 89373553920.

The previous prime is 111012120103. The next prime is 111012120139. The reversal of 111012120121 is 121021210111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111012120103) and next prime (111012120139).

It is not a de Polignac number, because 111012120121 - 2⁷ = 111012119993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111012120151) 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 15 ways as a sum of consecutive naturals, for example, 891546 + ... + 1008403.

It is an arithmetic number, because the mean of its divisors is an integer number (8412978600).

Almost surely, 2^111012120121 is an apocalyptic number.

It is an amenable number.

111012120121 is a deficient number, since it is larger than the sum of its proper divisors (23595537479).

111012120121 is a wasteful number, since it uses less digits than its factorization.

111012120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900464.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111012120121 its reverse (121021210111), we get a palindrome (232033330232).

The spelling of 111012120121 in words is "one hundred eleven billion, twelve million, one hundred twenty thousand, one hundred twenty-one".