123213135212 has 6 divisors (see below), whose sum is σ = 215622986628. Its totient is φ = 61606567604.

The previous prime is 123213135163. The next prime is 123213135217. The reversal of 123213135212 is 212531312321.

It is not an unprimeable number, because it can be changed into a prime (123213135217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15401641898 + ... + 15401641905.

It is an arithmetic number, because the mean of its divisors is an integer number (35937164438).

Almost surely, 2^123213135212 is an apocalyptic number.

It is an amenable number.

123213135212 is a deficient number, since it is larger than the sum of its proper divisors (92409851416).

123213135212 is a wasteful number, since it uses less digits than its factorization.

123213135212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30803283807 (or 30803283805 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

Adding to 123213135212 its reverse (212531312321), we get a palindrome (335744447533).

The spelling of 123213135212 in words is "one hundred twenty-three billion, two hundred thirteen million, one hundred thirty-five thousand, two hundred twelve".