221212002200 has 96 divisors (see below), whose sum is σ = 595844110560. Its totient is φ = 74805120000.

The previous prime is 221212002199. The next prime is 221212002227. The reversal of 221212002200 is 2200212122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 980051 + ... + 1184450.

It is an arithmetic number, because the mean of its divisors is an integer number (6206709485).

Almost surely, 2^221212002200 is an apocalyptic number.

221212002200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221212002200 is an abundant number, since it is smaller than the sum of its proper divisors (374632108360).

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

221212002200 is a wasteful number, since it uses less digits than its factorization.

221212002200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164597 (or 2164588 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221212002200 its reverse (2200212122), we get a palindrome (223412214322).

The spelling of 221212002200 in words is "two hundred twenty-one billion, two hundred twelve million, two thousand, two hundred".