21201110002222 has 8 divisors (see below), whose sum is σ = 32237304250176. Its totient is φ = 10455341918832.

The previous prime is 21201110002129. The next prime is 21201110002291. The reversal of 21201110002222 is 22220001110212.

It is a happy number.

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 = 21201110002196 and 21201110002205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72606540958 + ... + 72606541249.

It is an arithmetic number, because the mean of its divisors is an integer number (4029663031272).

Almost surely, 2^{21201110002222} is an apocalyptic number.

21201110002222 is a deficient number, since it is larger than the sum of its proper divisors (11036194247954).

21201110002222 is a wasteful number, since it uses less digits than its factorization.

21201110002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145213082282.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21201110002222 its reverse (22220001110212), we get a palindrome (43421111112434).

The spelling of 21201110002222 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, two thousand, two hundred twenty-two".