221021200222 has 4 divisors (see below), whose sum is σ = 331531800336. Its totient is φ = 110510600110.

The previous prime is 221021200181. The next prime is 221021200229. The reversal of 221021200222 is 222002120122.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 221021200196 and 221021200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021200229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255300054 + ... + 55255300057.

It is an arithmetic number, because the mean of its divisors is an integer number (82882950084).

Almost surely, 2^221021200222 is an apocalyptic number.

221021200222 is a deficient number, since it is larger than the sum of its proper divisors (110510600114).

221021200222 is a wasteful number, since it uses less digits than its factorization.

221021200222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110510600113.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221021200222 its reverse (222002120122), we get a palindrome (443023320344).

The spelling of 221021200222 in words is "two hundred twenty-one billion, twenty-one million, two hundred thousand, two hundred twenty-two".