123212213312 has 28 divisors (see below), whose sum is σ = 245473368336. Its totient is φ = 61360656000.

The previous prime is 123212213249. The next prime is 123212213317. The reversal of 123212213312 is 213312212321.

It is not an unprimeable number, because it can be changed into a prime (123212213317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3818978 + ... + 3851105.

It is an arithmetic number, because the mean of its divisors is an integer number (8766906012).

Almost surely, 2^123212213312 is an apocalyptic number.

It is an amenable number.

123212213312 is a deficient number, since it is larger than the sum of its proper divisors (122261155024).

123212213312 is an equidigital number, since it uses as much as digits as its factorization.

123212213312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7670346 (or 7670336 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 123212213312 its reverse (213312212321), we get a palindrome (336524425633).

Subtracting 123212213312 from its reverse (213312212321), we obtain a palindrome (90099999009).

The spelling of 123212213312 in words is "one hundred twenty-three billion, two hundred twelve million, two hundred thirteen thousand, three hundred twelve".