123011210212 has 18 divisors (see below), whose sum is σ = 236618671814. Its totient is φ = 55914186240.

The previous prime is 123011210173. The next prime is 123011210227. The reversal of 123011210212 is 212012110321.

It can be written as a sum of positive squares in only one way, i.e., 79944169536 + 43067040676 = 282744^2 + 207526^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127077213 + ... + 127078180.

Almost surely, 2^123011210212 is an apocalyptic number.

It is an amenable number.

123011210212 is a deficient number, since it is larger than the sum of its proper divisors (113607461602).

123011210212 is a wasteful number, since it uses less digits than its factorization.

123011210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254155419 (or 254155406 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 123011210212 its reverse (212012110321), we get a palindrome (335023320533).

The spelling of 123011210212 in words is "one hundred twenty-three billion, eleven million, two hundred ten thousand, two hundred twelve".