111012012222121 has 4 divisors (see below), whose sum is σ = 111065357737044. Its totient is φ = 110958666707200.

The previous prime is 111012012222101. The next prime is 111012012222149. The reversal of 111012012222121 is 121222210210111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64786481490025 + 46225530732096 = 8049005^2 + 6798936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111012012222121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111012012222101) 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, 26672754340 + ... + 26672758501.

It is an arithmetic number, because the mean of its divisors is an integer number (27766339434261).

Almost surely, 2^{111012012222121} is an apocalyptic number.

It is an amenable number.

111012012222121 is a deficient number, since it is larger than the sum of its proper divisors (53345514923).

111012012222121 is an equidigital number, since it uses as much as digits as its factorization.

111012012222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53345514922.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111012012222121 its reverse (121222210210111), we get a palindrome (232234222432232).

The spelling of 111012012222121 in words is "one hundred eleven trillion, twelve billion, twelve million, two hundred twenty-two thousand, one hundred twenty-one".