221112001200 has 240 divisors, whose sum is σ = 731832651776. Its totient is φ = 57007411200.

The previous prime is 221112001157. The next prime is 221112001211. The reversal of 221112001200 is 2100211122.

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, 52933512 + ... + 52937688.

Almost surely, 2^221112001200 is an apocalyptic number.

221112001200 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 221112001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365916325888).

221112001200 is an abundant number, since it is smaller than the sum of its proper divisors (510720650576).

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

221112001200 is a wasteful number, since it uses less digits than its factorization.

221112001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5652 (or 5641 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221112001200 its reverse (2100211122), we get a palindrome (223212212322).

The spelling of 221112001200 in words is "two hundred twenty-one billion, one hundred twelve million, one thousand, two hundred".