111312023211221 has 8 divisors (see below), whose sum is σ = 127213806480384. Its totient is φ = 95410256358960.

The previous prime is 111312023211133. The next prime is 111312023211223. The reversal of 111312023211221 is 122112320213111.

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

It is a cyclic number.

It is not a de Polignac number, because 111312023211221 - 2³⁴ = 111294843342037 is a prime.

It is a super-2 number, since 2×111312023211221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111312023211223) 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, 19394636 + ... + 24469898.

It is an arithmetic number, because the mean of its divisors is an integer number (15901725810048).

Almost surely, 2^{111312023211221} is an apocalyptic number.

It is an amenable number.

111312023211221 is a deficient number, since it is larger than the sum of its proper divisors (15901783269163).

111312023211221 is an equidigital number, since it uses as much as digits as its factorization.

111312023211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8208451.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 111312023211221 its reverse (122112320213111), we get a palindrome (233424343424332).

The spelling of 111312023211221 in words is "one hundred eleven trillion, three hundred twelve billion, twenty-three million, two hundred eleven thousand, two hundred twenty-one".