221012012001 has 16 divisors (see below), whose sum is σ = 324003299328. Its totient is φ = 132891973200.

The previous prime is 221012011973. The next prime is 221012012003. The reversal of 221012012001 is 100210210122.

It is not a de Polignac number, because 221012012001 - 2²⁵ = 220978457569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221012012003) 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, 26363265 + ... + 26371646.

It is an arithmetic number, because the mean of its divisors is an integer number (20250206208).

Almost surely, 2^221012012001 is an apocalyptic number.

It is an amenable number.

221012012001 is a deficient number, since it is larger than the sum of its proper divisors (102991287327).

221012012001 is a wasteful number, since it uses less digits than its factorization.

221012012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52735052.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221012012001 its reverse (100210210122), we get a palindrome (321222222123).

The spelling of 221012012001 in words is "two hundred twenty-one billion, twelve million, twelve thousand, one".