221111112022021 has 8 divisors (see below), whose sum is σ = 238497027824384. Its totient is φ = 203779106037360.

The previous prime is 221111112021967. The next prime is 221111112022033. The reversal of 221111112022021 is 120220211111122.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221111112022021 is a prime.

It is a super-2 number, since 2×221111112022021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221111112022021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111116022021) 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, 13477445901 + ... + 13477462306.

It is an arithmetic number, because the mean of its divisors is an integer number (29812128478048).

Almost surely, 2^{221111112022021} is an apocalyptic number.

It is an amenable number.

221111112022021 is a deficient number, since it is larger than the sum of its proper divisors (17385915802363).

221111112022021 is a wasteful number, since it uses less digits than its factorization.

221111112022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26954908851.

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

Adding to 221111112022021 its reverse (120220211111122), we get a palindrome (341331323133143).

The spelling of 221111112022021 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twelve million, twenty-two thousand, twenty-one".