123102311212 has 6 divisors (see below), whose sum is σ = 215429044628. Its totient is φ = 61551155604.

The previous prime is 123102311179. The next prime is 123102311219. The reversal of 123102311212 is 212113201321.

It is a super-2 number, since 2×123102311212² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123102311212.

It is not an unprimeable number, because it can be changed into a prime (123102311219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15387788898 + ... + 15387788905.

Almost surely, 2^123102311212 is an apocalyptic number.

It is an amenable number.

123102311212 is a deficient number, since it is larger than the sum of its proper divisors (92326733416).

123102311212 is a wasteful number, since it uses less digits than its factorization.

123102311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30775577807 (or 30775577805 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123102311212 its reverse (212113201321), we get a palindrome (335215512533).

The spelling of 123102311212 in words is "one hundred twenty-three billion, one hundred two million, three hundred eleven thousand, two hundred twelve".