221112020211121 has 8 divisors (see below), whose sum is σ = 238120753112424. Its totient is φ = 204103303875840.

The previous prime is 221112020211109. The next prime is 221112020211127. The reversal of 221112020211121 is 121112020211122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 112161359025 + 220999858852096 = 334905^2 + 14866064^2 .

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 221112020211121 - 2¹³ = 221112020202929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221112020211127) 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, 46656585 + ... + 51176761.

It is an arithmetic number, because the mean of its divisors is an integer number (29765094139053).

Almost surely, 2^{221112020211121} is an apocalyptic number.

It is an amenable number.

221112020211121 is a deficient number, since it is larger than the sum of its proper divisors (17008732901303).

221112020211121 is a wasteful number, since it uses less digits than its factorization.

221112020211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8283011.

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

Adding to 221112020211121 its reverse (121112020211122), we get a palindrome (342224040422243).

Subtracting from 221112020211121 its reverse (121112020211122), we obtain a palindrome (99999999999999).

The spelling of 221112020211121 in words is "two hundred twenty-one trillion, one hundred twelve billion, twenty million, two hundred eleven thousand, one hundred twenty-one".