123421311 has 24 divisors (see below), whose sum is σ = 193240320. Its totient is φ = 75456576.

The previous prime is 123421271. The next prime is 123421327. The reversal of 123421311 is 113124321.

123421311 is a `hidden beast` number, since 12 + 342 + 1 + 311 = 666.

123421311 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 123421311 - 2¹⁰ = 123420287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15010 + ... + 21728.

It is an arithmetic number, because the mean of its divisors is an integer number (8051680).

Almost surely, 2^123421311 is an apocalyptic number.

123421311 is a deficient number, since it is larger than the sum of its proper divisors (69819009).

123421311 is a wasteful number, since it uses less digits than its factorization.

123421311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6895 (or 6892 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 123421311 is about 11109.5144358338. The cubic root of 123421311 is about 497.8861572649.

Adding to 123421311 its reverse (113124321), we get a palindrome (236545632).

The spelling of 123421311 in words is "one hundred twenty-three million, four hundred twenty-one thousand, three hundred eleven".