221022011221 has 16 divisors (see below), whose sum is σ = 242678405376. Its totient is φ = 199630080000.

The previous prime is 221022011149. The next prime is 221022011233. The reversal of 221022011221 is 122110220122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221022011221 - 2¹³ = 221022003029 is a prime.

It is a super-3 number, since 3×221022011221³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221022011195 and 221022011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022011251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1045861 + ... + 1239301.

It is an arithmetic number, because the mean of its divisors is an integer number (15167400336).

Almost surely, 2^221022011221 is an apocalyptic number.

It is an amenable number.

221022011221 is a deficient number, since it is larger than the sum of its proper divisors (21656394155).

221022011221 is a wasteful number, since it uses less digits than its factorization.

221022011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194124.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221022011221 its reverse (122110220122), we get a palindrome (343132231343).

The spelling of 221022011221 in words is "two hundred twenty-one billion, twenty-two million, eleven thousand, two hundred twenty-one".