112211111212221 has 8 divisors (see below), whose sum is σ = 170988359942464. Its totient is φ = 64120634978400.

The previous prime is 112211111212169. The next prime is 112211111212243. The reversal of 112211111212221 is 122212111112211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 112211111212221 - 2¹⁷ = 112211111081149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5343386248201 = 112211111212221 / (1 + 1 + 2 + 2 + 1 + 1 + 1 + 1 + 1 + 2 + 1 + 2 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112211911212221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2671693124080 + ... + 2671693124121.

It is an arithmetic number, because the mean of its divisors is an integer number (21373544992808).

Almost surely, 2^{112211111212221} is an apocalyptic number.

It is an amenable number.

112211111212221 is a deficient number, since it is larger than the sum of its proper divisors (58777248730243).

112211111212221 is an equidigital number, since it uses as much as digits as its factorization.

112211111212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5343386248211.

The product of its digits is 64, while the sum is 21.

Adding to 112211111212221 its reverse (122212111112211), we get a palindrome (234423222324432).

The spelling of 112211111212221 in words is "one hundred twelve trillion, two hundred eleven billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-one".