221022100000001 has 4 divisors (see below), whose sum is σ = 222762431496192. Its totient is φ = 219281768503812.

The previous prime is 221022099999991. The next prime is 221022100000033. The reversal of 221022100000001 is 100000001220122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221022100000001 - 2¹⁰ = 221022099998977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221022100000061) 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, 870165747905 + ... + 870165748158.

It is an arithmetic number, because the mean of its divisors is an integer number (55690607874048).

Almost surely, 2^{221022100000001} is an apocalyptic number.

It is an amenable number.

221022100000001 is a deficient number, since it is larger than the sum of its proper divisors (1740331496191).

221022100000001 is a wasteful number, since it uses less digits than its factorization.

221022100000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740331496190.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221022100000001 its reverse (100000001220122), we get a palindrome (321022101220123).

The spelling of 221022100000001 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred million, one", and thus it is an aban number.