1211110011223 has 4 divisors (see below), whose sum is σ = 1384125727120. Its totient is φ = 1038094295328.

The previous prime is 1211110011197. The next prime is 1211110011229. The reversal of 1211110011223 is 3221100111121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211110011223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211110011197 and 1211110011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211110011229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86507857938 + ... + 86507857951.

It is an arithmetic number, because the mean of its divisors is an integer number (346031431780).

Almost surely, 2^{1211110011223} is an apocalyptic number.

1211110011223 is a deficient number, since it is larger than the sum of its proper divisors (173015715897).

1211110011223 is an equidigital number, since it uses as much as digits as its factorization.

1211110011223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173015715896.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1211110011223 its reverse (3221100111121), we get a palindrome (4432210122344).

The spelling of 1211110011223 in words is "one trillion, two hundred eleven billion, one hundred ten million, eleven thousand, two hundred twenty-three".