20130221200 has 30 divisors (see below), whose sum is σ = 48362857394. Its totient is φ = 8052088320.

The previous prime is 20130221191. The next prime is 20130221219. The reversal of 20130221200 is 212203102.

It can be written as a sum of positive squares in 3 ways, for example, as 5135728896 + 14994492304 = 71664^2 + 122452^2 .

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, 25162377 + ... + 25163176.

Almost surely, 2^20130221200 is an apocalyptic number.

20130221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20130221200 is an abundant number, since it is smaller than the sum of its proper divisors (28232636194).

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

20130221200 is a wasteful number, since it uses less digits than its factorization.

20130221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50325571 (or 50325560 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20130221200 its reverse (212203102), we get a palindrome (20342424302).

The spelling of 20130221200 in words is "twenty billion, one hundred thirty million, two hundred twenty-one thousand, two hundred".