1200121008 has 20 divisors (see below), whose sum is σ = 3100312728. Its totient is φ = 400040320.

The previous prime is 1200120989. The next prime is 1200121009. The reversal of 1200121008 is 8001210021.

It is not an unprimeable number, because it can be changed into a prime (1200121009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12501213 + ... + 12501308.

Almost surely, 2^1200121008 is an apocalyptic number.

It is an amenable number.

1200121008 is an abundant number, since it is smaller than the sum of its proper divisors (1900191720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200121008 is a wasteful number, since it uses less digits than its factorization.

1200121008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25002532 (or 25002526 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1200121008 is about 34642.7627073823. The cubic root of 1200121008 is about 1062.6942874787.

Adding to 1200121008 its reverse (8001210021), we get a palindrome (9201331029).

The spelling of 1200121008 in words is "one billion, two hundred million, one hundred twenty-one thousand, eight".