22102002221 has 8 divisors (see below), whose sum is σ = 24047540664. Its totient is φ = 20191518720.

The previous prime is 22102002217. The next prime is 22102002253. The reversal of 22102002221 is 12220020122.

It can be written as a sum of positive squares in 4 ways, for example, as 4072226596 + 18029775625 = 63814^2 + 134275^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22102002221 - 2² = 22102002217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22102002196 and 22102002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102002271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8762420 + ... + 8764941.

It is an arithmetic number, because the mean of its divisors is an integer number (3005942583).

Almost surely, 2^22102002221 is an apocalyptic number.

It is an amenable number.

22102002221 is a deficient number, since it is larger than the sum of its proper divisors (1945538443).

22102002221 is a wasteful number, since it uses less digits than its factorization.

22102002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17527471.

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

Adding to 22102002221 its reverse (12220020122), we get a palindrome (34322022343).

The spelling of 22102002221 in words is "twenty-two billion, one hundred two million, two thousand, two hundred twenty-one".