123121232212 has 48 divisors (see below), whose sum is σ = 243534574080. Its totient is φ = 53957404800.

The previous prime is 123121232209. The next prime is 123121232233. The reversal of 123121232212 is 212232121321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199138 + ... + 534694.

It is an arithmetic number, because the mean of its divisors is an integer number (5073636960).

Almost surely, 2^123121232212 is an apocalyptic number.

It is an amenable number.

123121232212 is a deficient number, since it is larger than the sum of its proper divisors (120413341868).

123121232212 is a wasteful number, since it uses less digits than its factorization.

123121232212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335872 (or 335870 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

Adding to 123121232212 its reverse (212232121321), we get a palindrome (335353353533).

The spelling of 123121232212 in words is "one hundred twenty-three billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred twelve".