111222012012221 has 4 divisors (see below), whose sum is σ = 121333104013344. Its totient is φ = 101110920011100.

The previous prime is 111222012012151. The next prime is 111222012012257. The reversal of 111222012012221 is 122210210222111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111222012012221 - 2¹⁸ = 111222011750077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111222012012193 and 111222012012202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222012012121) 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, 5055546000545 + ... + 5055546000566.

It is an arithmetic number, because the mean of its divisors is an integer number (30333276003336).

Almost surely, 2^{111222012012221} is an apocalyptic number.

111222012012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111222012012221 is a deficient number, since it is larger than the sum of its proper divisors (10111092001123).

111222012012221 is a wasteful number, since it uses less digits than its factorization.

111222012012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111092001122.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111222012012221 its reverse (122210210222111), we get a palindrome (233432222234332).

The spelling of 111222012012221 in words is "one hundred eleven trillion, two hundred twenty-two billion, twelve million, twelve thousand, two hundred twenty-one".