221102220000021 has 16 divisors (see below), whose sum is σ = 295007185905600. Its totient is φ = 147299401791360.

The previous prime is 221102219999987. The next prime is 221102220000029. The reversal of 221102220000021 is 120000022201122.

221102220000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221102220000021 - 2²² = 221102215805717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102220000029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21132081 + ... + 29812233.

It is an arithmetic number, because the mean of its divisors is an integer number (18437949119100).

Almost surely, 2^{221102220000021} is an apocalyptic number.

It is an amenable number.

221102220000021 is a deficient number, since it is larger than the sum of its proper divisors (73904965905579).

221102220000021 is a wasteful number, since it uses less digits than its factorization.

221102220000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8686036.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221102220000021 its reverse (120000022201122), we get a palindrome (341102242201143).

The spelling of 221102220000021 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twenty million, twenty-one", and thus it is an aban number.