123421131 has 16 divisors (see below), whose sum is σ = 192470400. Its totient is φ = 77949864.

The previous prime is 123421121. The next prime is 123421171. The reversal of 123421131 is 131124321.

It is not a de Polignac number, because 123421131 - 2⁵ = 123421099 is a prime.

It is a super-2 number, since 2×123421131² = 30465551154638322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123421121) 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, 119781 + ... + 120806.

It is an arithmetic number, because the mean of its divisors is an integer number (12029400).

Almost surely, 2^123421131 is an apocalyptic number.

123421131 is a deficient number, since it is larger than the sum of its proper divisors (69049269).

123421131 is a wasteful number, since it uses less digits than its factorization.

123421131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240615 (or 240609 counting only the distinct ones).

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

The square root of 123421131 is about 11109.5063346667. The cubic root of 123421131 is about 497.8859152226.

Adding to 123421131 its reverse (131124321), we get a palindrome (254545452).

The spelling of 123421131 in words is "one hundred twenty-three million, four hundred twenty-one thousand, one hundred thirty-one".