221100112212001 has 16 divisors (see below), whose sum is σ = 243618350977728. Its totient is φ = 198985403512000.

The previous prime is 221100112211941. The next prime is 221100112212041. The reversal of 221100112212001 is 100212211001122.

It is a cyclic number.

It is not a de Polignac number, because 221100112212001 - 2¹³ = 221100112203809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100112212041) 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, 3303871 + ... + 21286516.

It is an arithmetic number, because the mean of its divisors is an integer number (15226146936108).

Almost surely, 2^{221100112212001} is an apocalyptic number.

It is an amenable number.

221100112212001 is a deficient number, since it is larger than the sum of its proper divisors (22518238765727).

221100112212001 is a wasteful number, since it uses less digits than its factorization.

221100112212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24598592.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221100112212001 its reverse (100212211001122), we get a palindrome (321312323213123).

The spelling of 221100112212001 in words is "two hundred twenty-one trillion, one hundred billion, one hundred twelve million, two hundred twelve thousand, one".