21201002222 has 8 divisors (see below), whose sum is σ = 31802576400. Its totient is φ = 10600143424.

The previous prime is 21201002197. The next prime is 21201002227. The reversal of 21201002222 is 22220010212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21201002197 and 21201002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201002227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97322 + ... + 227757.

It is an arithmetic number, because the mean of its divisors is an integer number (3975322050).

Almost surely, 2^21201002222 is an apocalyptic number.

21201002222 is a deficient number, since it is larger than the sum of its proper divisors (10601574178).

21201002222 is a wasteful number, since it uses less digits than its factorization.

21201002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357690.

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

Adding to 21201002222 its reverse (22220010212), we get a palindrome (43421012434).

The spelling of 21201002222 in words is "twenty-one billion, two hundred one million, two thousand, two hundred twenty-two".