1213112223 has 12 divisors (see below), whose sum is σ = 1795012128. Its totient is φ = 789015840.

The previous prime is 1213112221. The next prime is 1213112233. The reversal of 1213112223 is 3222113121.

It is not a de Polignac number, because 1213112223 - 2¹ = 1213112221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213112196 and 1213112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213112221) 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, 1643415 + ... + 1644152.

It is an arithmetic number, because the mean of its divisors is an integer number (149584344).

Almost surely, 2^1213112223 is an apocalyptic number.

1213112223 is a deficient number, since it is larger than the sum of its proper divisors (581899905).

1213112223 is a wasteful number, since it uses less digits than its factorization.

1213112223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287614 (or 3287611 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1213112223 is about 34829.7605934925. The cubic root of 1213112223 is about 1066.5150611464.

Adding to 1213112223 its reverse (3222113121), we get a palindrome (4435225344).

The spelling of 1213112223 in words is "one billion, two hundred thirteen million, one hundred twelve thousand, two hundred twenty-three".