123213211 has 6 divisors (see below), whose sum is σ = 135432836. Its totient is φ = 112011900.

The previous prime is 123213203. The next prime is 123213247. The reversal of 123213211 is 112312321.

It is not a de Polignac number, because 123213211 - 2³ = 123213203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123213281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 509025 + ... + 509266.

Almost surely, 2^123213211 is an apocalyptic number.

123213211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123213211 is a deficient number, since it is larger than the sum of its proper divisors (12219625).

123213211 is a wasteful number, since it uses less digits than its factorization.

123213211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018313 (or 1018302 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 123213211 is about 11100.1446386973. The cubic root of 123213211 is about 497.6061721331.

Adding to 123213211 its reverse (112312321), we get a palindrome (235525532).

The spelling of 123213211 in words is "one hundred twenty-three million, two hundred thirteen thousand, two hundred eleven".