1111212120223 has 8 divisors (see below), whose sum is σ = 1112821137792. Its totient is φ = 1109603325336.

The previous prime is 1111212120209. The next prime is 1111212120257. The reversal of 1111212120223 is 3220212121111.

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 1111212120223 - 2⁵ = 1111212120191 is a prime.

It is a super-2 number, since 2×1111212120223² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111212120223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111212120023) 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, 11720736 + ... + 11815162.

It is an arithmetic number, because the mean of its divisors is an integer number (139102642224).

Almost surely, 2^{1111212120223} is an apocalyptic number.

1111212120223 is a deficient number, since it is larger than the sum of its proper divisors (1609017569).

1111212120223 is an equidigital number, since it uses as much as digits as its factorization.

1111212120223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111341.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1111212120223 its reverse (3220212121111), we get a palindrome (4331424241334).

The spelling of 1111212120223 in words is "one trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty thousand, two hundred twenty-three".