201220022001 has 16 divisors (see below), whose sum is σ = 276172265600. Its totient is φ = 130223749248.

The previous prime is 201220021957. The next prime is 201220022009. The reversal of 201220022001 is 100220022102.

It is not a de Polignac number, because 201220022001 - 2⁹ = 201220021489 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 (201220022009) 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, 2015956 + ... + 2113413.

It is an arithmetic number, because the mean of its divisors is an integer number (17260766600).

Almost surely, 2^201220022001 is an apocalyptic number.

It is an amenable number.

201220022001 is a deficient number, since it is larger than the sum of its proper divisors (74952243599).

201220022001 is a wasteful number, since it uses less digits than its factorization.

201220022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129848.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 201220022001 its reverse (100220022102), we get a palindrome (301440044103).

The spelling of 201220022001 in words is "two hundred one billion, two hundred twenty million, twenty-two thousand, one".