123222100111 has 4 divisors (see below), whose sum is σ = 134424109224. Its totient is φ = 112020091000.

The previous prime is 123222100081. The next prime is 123222100121. The reversal of 123222100111 is 111001222321.

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

It is a cyclic number.

It is not a de Polignac number, because 123222100111 - 2⁷ = 123222099983 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 (123222100121) 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, 5601004540 + ... + 5601004561.

It is an arithmetic number, because the mean of its divisors is an integer number (33606027306).

Almost surely, 2^123222100111 is an apocalyptic number.

123222100111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123222100111 is a deficient number, since it is larger than the sum of its proper divisors (11202009113).

123222100111 is a wasteful number, since it uses less digits than its factorization.

123222100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11202009112.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 123222100111 its reverse (111001222321), we get a palindrome (234223322432).

The spelling of 123222100111 in words is "one hundred twenty-three billion, two hundred twenty-two million, one hundred thousand, one hundred eleven".