221002245200 has 120 divisors (see below), whose sum is σ = 580539423456. Its totient is φ = 80182336000.

The previous prime is 221002245179. The next prime is 221002245203. The reversal of 221002245200 is 2542200122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002245203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1892510 + ... + 2005890.

Almost surely, 2^221002245200 is an apocalyptic number.

221002245200 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 221002245200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290269711728).

221002245200 is an abundant number, since it is smaller than the sum of its proper divisors (359537178256).

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

221002245200 is a wasteful number, since it uses less digits than its factorization.

221002245200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113853 (or 113842 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 221002245200 its reverse (2542200122), we get a palindrome (223544445322).

The spelling of 221002245200 in words is "two hundred twenty-one billion, two million, two hundred forty-five thousand, two hundred".