1201221200 has 30 divisors (see below), whose sum is σ = 2885934894. Its totient is φ = 480488320.

The previous prime is 1201221143. The next prime is 1201221223. The reversal of 1201221200 is 21221021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 288456256 + 912764944 = 16984^2 + 30212^2 .

It is a congruent number.

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, 1501127 + ... + 1501926.

Almost surely, 2^1201221200 is an apocalyptic number.

1201221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201221200 is an abundant number, since it is smaller than the sum of its proper divisors (1684713694).

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

1201221200 is a wasteful number, since it uses less digits than its factorization.

1201221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003071 (or 3003060 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1201221200 is about 34658.6381729000. The cubic root of 1201221200 is about 1063.0189243711.

Adding to 1201221200 its reverse (21221021), we get a palindrome (1222442221).

The spelling of 1201221200 in words is "one billion, two hundred one million, two hundred twenty-one thousand, two hundred".