22102001122221 has 24 divisors (see below), whose sum is σ = 33666817764320. Its totient is φ = 13933639058976.

The previous prime is 22102001122217. The next prime is 22102001122249. The reversal of 22102001122221 is 12222110020122.

It is a happy number.

22102001122221 is a `hidden beast` number, since 2 + 210 + 200 + 11 + 22 + 221 = 666.

It is not a de Polignac number, because 22102001122221 - 2² = 22102001122217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22102001122194 and 22102001122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102001127221) 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, 118052230 + ... + 118239303.

Almost surely, 2^{22102001122221} is an apocalyptic number.

It is an amenable number.

22102001122221 is a deficient number, since it is larger than the sum of its proper divisors (11564816642099).

22102001122221 is a wasteful number, since it uses less digits than its factorization.

22102001122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236292105 (or 236292102 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22102001122221 its reverse (12222110020122), we get a palindrome (34324111142343).

The spelling of 22102001122221 in words is "twenty-two trillion, one hundred two billion, one million, one hundred twenty-two thousand, two hundred twenty-one".