1200123112 has 8 divisors (see below), whose sum is σ = 2250230850. Its totient is φ = 600061552.

The previous prime is 1200123103. The next prime is 1200123131. The reversal of 1200123112 is 2113210021.

It can be written as a sum of positive squares in only one way, i.e., 1115960836 + 84162276 = 33406^2 + 9174^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1200123092 and 1200123101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75007687 + ... + 75007702.

Almost surely, 2^1200123112 is an apocalyptic number.

It is an amenable number.

1200123112 is a deficient number, since it is larger than the sum of its proper divisors (1050107738).

1200123112 is a wasteful number, since it uses less digits than its factorization.

1200123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150015395 (or 150015391 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1200123112 is about 34642.7930744621. The cubic root of 1200123112 is about 1062.6949085015.

Adding to 1200123112 its reverse (2113210021), we get a palindrome (3313333133).

The spelling of 1200123112 in words is "one billion, two hundred million, one hundred twenty-three thousand, one hundred twelve".