1223110212111 has 12 divisors (see below), whose sum is σ = 1769724493992. Its totient is φ = 814017695856.

The previous prime is 1223110212043. The next prime is 1223110212139. The reversal of 1223110212111 is 1112120113221.

It is a happy number.

1223110212111 is a `hidden beast` number, since 122 + 311 + 0 + 21 + 211 + 1 = 666.

It is not a de Polignac number, because 1223110212111 - 2²² = 1223106017807 is a prime.

It is a super-2 number, since 2×1223110212111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223110212151) 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, 115753776 + ... + 115764341.

It is an arithmetic number, because the mean of its divisors is an integer number (147477041166).

Almost surely, 2^{1223110212111} is an apocalyptic number.

1223110212111 is a deficient number, since it is larger than the sum of its proper divisors (546614281881).

1223110212111 is a wasteful number, since it uses less digits than its factorization.

1223110212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231518710 (or 231518707 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1223110212111 its reverse (1112120113221), we get a palindrome (2335230325332).

The spelling of 1223110212111 in words is "one trillion, two hundred twenty-three billion, one hundred ten million, two hundred twelve thousand, one hundred eleven".