221122222021001 has 64 divisors (see below), whose sum is σ = 266648666812416. Its totient is φ = 179269312992000.

The previous prime is 221122222020989. The next prime is 221122222021073. The reversal of 221122222021001 is 100120222221122.

221122222021001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-221122222021001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221122222021081) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77777776286 + ... + 77777779128.

It is an arithmetic number, because the mean of its divisors is an integer number (4166385418944).

Almost surely, 2^{221122222021001} is an apocalyptic number.

It is an amenable number.

221122222021001 is a deficient number, since it is larger than the sum of its proper divisors (45526444791415).

221122222021001 is a wasteful number, since it uses less digits than its factorization.

221122222021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7382.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221122222021001 its reverse (100120222221122), we get a palindrome (321242444242123).

The spelling of 221122222021001 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, one".