111012222212221 has 16 divisors (see below), whose sum is σ = 122059244298240. Its totient is φ = 100124385666480.

The previous prime is 111012222212209. The next prime is 111012222212279. The reversal of 111012222212221 is 122212222210111.

It is a cyclic number.

It is not a de Polignac number, because 111012222212221 - 2¹⁹ = 111012221687933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111012222212192 and 111012222212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012222212321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132951210 + ... + 133783588.

It is an arithmetic number, because the mean of its divisors is an integer number (7628702768640).

Almost surely, 2^{111012222212221} is an apocalyptic number.

111012222212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111012222212221 is a deficient number, since it is larger than the sum of its proper divisors (11047022086019).

111012222212221 is a wasteful number, since it uses less digits than its factorization.

111012222212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927984.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 111012222212221 its reverse (122212222210111), we get a palindrome (233224444422332).

The spelling of 111012222212221 in words is "one hundred eleven trillion, twelve billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".