221121010222111 has 8 divisors (see below), whose sum is σ = 226516856958000. Its totient is φ = 215725289741760.

The previous prime is 221121010222093. The next prime is 221121010222153. The reversal of 221121010222111 is 111222010121122.

It is a happy number.

221121010222111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221121010222111 - 2²¹ = 221121008124959 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 (221121010222181) 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, 28013581 + ... + 35028598.

It is an arithmetic number, because the mean of its divisors is an integer number (28314607119750).

Almost surely, 2^{221121010222111} is an apocalyptic number.

221121010222111 is a deficient number, since it is larger than the sum of its proper divisors (5395846735889).

221121010222111 is an equidigital number, since it uses as much as digits as its factorization.

221121010222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63127769.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221121010222111 its reverse (111222010121122), we get a palindrome (332343020343233).

The spelling of 221121010222111 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, ten million, two hundred twenty-two thousand, one hundred eleven".