221000121112111 has 8 divisors (see below), whose sum is σ = 243478081226448. Its totient is φ = 198920001000000.

The previous prime is 221000121112109. The next prime is 221000121112207. The reversal of 221000121112111 is 111211121000122.

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

It is a cyclic number.

It is not a de Polignac number, because 221000121112111 - 2¹ = 221000121112109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000121182111) 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, 99459999390 + ... + 99460001611.

It is an arithmetic number, because the mean of its divisors is an integer number (30434760153306).

Almost surely, 2^{221000121112111} is an apocalyptic number.

221000121112111 is a deficient number, since it is larger than the sum of its proper divisors (22477960114337).

221000121112111 is a wasteful number, since it uses less digits than its factorization.

221000121112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198920001113.

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

Adding to 221000121112111 its reverse (111211121000122), we get a palindrome (332211242112233).

The spelling of 221000121112111 in words is "two hundred twenty-one trillion, one hundred twenty-one million, one hundred twelve thousand, one hundred eleven".