123212907 has 12 divisors (see below), whose sum is σ = 184566200. Its totient is φ = 82141776.

The previous prime is 123212899. The next prime is 123212911. The reversal of 123212907 is 709212321.

It is not a de Polignac number, because 123212907 - 2³ = 123212899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123212917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253282 + ... + 253767.

Almost surely, 2^123212907 is an apocalyptic number.

123212907 is a deficient number, since it is larger than the sum of its proper divisors (61353293).

123212907 is an frugal number, since it uses more digits than its factorization.

123212907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507064 (or 507052 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 123212907 is about 11100.1309451736. The cubic root of 123212907 is about 497.6057628902.

The spelling of 123212907 in words is "one hundred twenty-three million, two hundred twelve thousand, nine hundred seven".