123403211 has 4 divisors (see below), whose sum is σ = 128768592. Its totient is φ = 118037832.

The previous prime is 123403201. The next prime is 123403229. The reversal of 123403211 is 112304321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112304321 = 71 ⋅1581751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123403211 is a prime.

It is a super-2 number, since 2×123403211² = 30456704970221042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123403211.

It is not an unprimeable number, because it can be changed into a prime (123403201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2682656 + ... + 2682701.

It is an arithmetic number, because the mean of its divisors is an integer number (32192148).

Almost surely, 2^123403211 is an apocalyptic number.

123403211 is a deficient number, since it is larger than the sum of its proper divisors (5365381).

123403211 is an equidigital number, since it uses as much as digits as its factorization.

123403211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5365380.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123403211 is about 11108.6997889042. The cubic root of 123403211 is about 497.8618173841.

Adding to 123403211 its reverse (112304321), we get a palindrome (235707532).

It can be divided in two parts, 12340 and 3211, that added together give a palindrome (15551).

The spelling of 123403211 in words is "one hundred twenty-three million, four hundred three thousand, two hundred eleven".