20012221200 has 240 divisors, whose sum is σ = 68590798400. Its totient is φ = 4972492800.

The previous prime is 20012221153. The next prime is 20012221231. The reversal of 20012221200 is 212221002.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1383606 + ... + 1397994.

Almost surely, 2^20012221200 is an apocalyptic number.

20012221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34295399200).

20012221200 is an abundant number, since it is smaller than the sum of its proper divisors (48578577200).

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

20012221200 is a wasteful number, since it uses less digits than its factorization.

20012221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14490 (or 14479 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20012221200 its reverse (212221002), we get a palindrome (20224442202).

The spelling of 20012221200 in words is "twenty billion, twelve million, two hundred twenty-one thousand, two hundred".