221120222001 has 32 divisors (see below), whose sum is σ = 341974767360. Its totient is φ = 124472484864.

The previous prime is 221120221969. The next prime is 221120222021. The reversal of 221120222001 is 100222021122.

It is not a de Polignac number, because 221120222001 - 2⁵ = 221120221969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221120222021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1183861 + ... + 1357853.

It is an arithmetic number, because the mean of its divisors is an integer number (10686711480).

Almost surely, 2^221120222001 is an apocalyptic number.

221120222001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221120222001 is a deficient number, since it is larger than the sum of its proper divisors (120854545359).

221120222001 is a wasteful number, since it uses less digits than its factorization.

221120222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174905.

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

Adding to 221120222001 its reverse (100222021122), we get a palindrome (321342243123).

The spelling of 221120222001 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, one".