111012111121221 has 12 divisors (see below), whose sum is σ = 160351324818880. Its totient is φ = 74007844399080.

The previous prime is 111012111121169. The next prime is 111012111121291. The reversal of 111012111121221 is 122121111210111.

111012111121221 is a `hidden beast` number, since 1 + 110 + 1 + 211 + 1 + 121 + 221 = 666.

It is not a de Polignac number, because 111012111121221 - 2¹⁴ = 111012111104837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111012111121194 and 111012111121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012111121291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16052845 + ... + 21902466.

Almost surely, 2^{111012111121221} is an apocalyptic number.

It is an amenable number.

111012111121221 is a deficient number, since it is larger than the sum of its proper divisors (49339213697659).

111012111121221 is a wasteful number, since it uses less digits than its factorization.

111012111121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38280296 (or 38280293 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111012111121221 its reverse (122121111210111), we get a palindrome (233133222331332).

The spelling of 111012111121221 in words is "one hundred eleven trillion, twelve billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".