1223201111 has 16 divisors (see below), whose sum is σ = 1413220608. Its totient is φ = 1047763200.

The previous prime is 1223201107. The next prime is 1223201123. The reversal of 1223201111 is 1111023221.

It is not a de Polignac number, because 1223201111 - 2² = 1223201107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223201141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19130 + ... + 53031.

It is an arithmetic number, because the mean of its divisors is an integer number (88326288).

Almost surely, 2^1223201111 is an apocalyptic number.

1223201111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1223201111 is a deficient number, since it is larger than the sum of its proper divisors (190019497).

1223201111 is a wasteful number, since it uses less digits than its factorization.

1223201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72262.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1223201111 is about 34974.2921443737. The cubic root of 1223201111 is about 1069.4634719528.

Adding to 1223201111 its reverse (1111023221), we get a palindrome (2334224332).

The spelling of 1223201111 in words is "one billion, two hundred twenty-three million, two hundred one thousand, one hundred eleven".