123212001 has 32 divisors (see below), whose sum is σ = 184112640. Its totient is φ = 73267920.

The previous prime is 123211997. The next prime is 123212027. The reversal of 123212001 is 100212321.

It is not a de Polignac number, because 123212001 - 2² = 123211997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123212041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235326 + ... + 235848.

It is an arithmetic number, because the mean of its divisors is an integer number (5753520).

Almost surely, 2^123212001 is an apocalyptic number.

123212001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123212001 is a deficient number, since it is larger than the sum of its proper divisors (60900639).

123212001 is an equidigital number, since it uses as much as digits as its factorization.

123212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 123212001 is about 11100.0901347692. The cubic root of 123212001 is about 497.6045432346.

Adding to 123212001 its reverse (100212321), we get a palindrome (223424322).

The spelling of 123212001 in words is "one hundred twenty-three million, two hundred twelve thousand, one".