221111202022201 has 16 divisors (see below), whose sum is σ = 244789798602240. Its totient is φ = 198891711308160.

The previous prime is 221111202022127. The next prime is 221111202022219. The reversal of 221111202022201 is 102220202111122.

It is a cyclic number.

It is not a de Polignac number, because 221111202022201 - 2²³ = 221111193633593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221111202022001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3541487860 + ... + 3541550293.

It is an arithmetic number, because the mean of its divisors is an integer number (15299362412640).

Almost surely, 2^{221111202022201} is an apocalyptic number.

It is an amenable number.

221111202022201 is a deficient number, since it is larger than the sum of its proper divisors (23678596580039).

221111202022201 is a wasteful number, since it uses less digits than its factorization.

221111202022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7083038256.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221111202022201 its reverse (102220202111122), we get a palindrome (323331404133323).

The spelling of 221111202022201 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred two million, twenty-two thousand, two hundred one".