123201440111 has 4 divisors (see below), whose sum is σ = 123204365232. Its totient is φ = 123198514992.

The previous prime is 123201440101. The next prime is 123201440123. The reversal of 123201440111 is 111044102321.

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 123201440111 - 2¹⁰ = 123201439087 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 (123201440101) 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, 1398446 + ... + 1483931.

It is an arithmetic number, because the mean of its divisors is an integer number (30801091308).

Almost surely, 2^123201440111 is an apocalyptic number.

123201440111 is a deficient number, since it is larger than the sum of its proper divisors (2925121).

123201440111 is an equidigital number, since it uses as much as digits as its factorization.

123201440111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925120.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 123201440111 its reverse (111044102321), we get a palindrome (234245542432).

The spelling of 123201440111 in words is "one hundred twenty-three billion, two hundred one million, four hundred forty thousand, one hundred eleven".