221102002100002 has 4 divisors (see below), whose sum is σ = 331653003150006. Its totient is φ = 110551001050000.

The previous prime is 221102002099991. The next prime is 221102002100041. The reversal of 221102002100002 is 200001200201122.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 214703991033961 + 6398011066041 = 14652781^2 + 2529429^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55275500524999 + ... + 55275500525002.

Almost surely, 2^{221102002100002} is an apocalyptic number.

221102002100002 is a deficient number, since it is larger than the sum of its proper divisors (110551001050004).

221102002100002 is a wasteful number, since it uses less digits than its factorization.

221102002100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110551001050003.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221102002100002 its reverse (200001200201122), we get a palindrome (421103202301124).

The spelling of 221102002100002 in words is "two hundred twenty-one trillion, one hundred two billion, two million, one hundred thousand, two".