221100012001 has 8 divisors (see below), whose sum is σ = 241801514208. Its totient is φ = 200498760000.

The previous prime is 221100011983. The next prime is 221100012019. The reversal of 221100012001 is 100210001122.

It is an interprime number because it is at equal distance from previous prime (221100011983) and next prime (221100012019).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221100012001 - 2¹⁷ = 221099880929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100012101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25057935 + ... + 25066756.

It is an arithmetic number, because the mean of its divisors is an integer number (30225189276).

Almost surely, 2^221100012001 is an apocalyptic number.

It is an amenable number.

221100012001 is a deficient number, since it is larger than the sum of its proper divisors (20701502207).

221100012001 is a wasteful number, since it uses less digits than its factorization.

221100012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50125103.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221100012001 its reverse (100210001122), we get a palindrome (321310013123).

The spelling of 221100012001 in words is "two hundred twenty-one billion, one hundred million, twelve thousand, one".