221100121001121 has 8 divisors (see below), whose sum is σ = 294809556283680. Its totient is φ = 147395383192992.

The previous prime is 221100121001113. The next prime is 221100121001153. The reversal of 221100121001121 is 121100121001122.

It is a happy number.

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

It is not a de Polignac number, because 221100121001121 - 2³ = 221100121001113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221100121001121.

It is not an unprimeable number, because it can be changed into a prime (221100121001191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174258780 + ... + 1174447053.

It is an arithmetic number, because the mean of its divisors is an integer number (36851194535460).

Almost surely, 2^{221100121001121} is an apocalyptic number.

It is an amenable number.

221100121001121 is a deficient number, since it is larger than the sum of its proper divisors (73709435282559).

221100121001121 is a wasteful number, since it uses less digits than its factorization.

221100121001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348737215.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221100121001121 its reverse (121100121001122), we get a palindrome (342200242002243).

Subtracting from 221100121001121 its reverse (121100121001122), we obtain a palindrome (99999999999999).

The spelling of 221100121001121 in words is "two hundred twenty-one trillion, one hundred billion, one hundred twenty-one million, one thousand, one hundred twenty-one".