221333222222021 has 16 divisors (see below), whose sum is σ = 272432126870400. Its totient is φ = 175106643715008.

The previous prime is 221333222221997. The next prime is 221333222222117. The reversal of 221333222222021 is 120222222333122.

It is a cyclic number.

It is not a de Polignac number, because 221333222222021 - 2³⁰ = 221332148480197 is a prime.

It is a super-2 number, since 2×221333222222021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221333222272021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97113806 + ... + 99366783.

It is an arithmetic number, because the mean of its divisors is an integer number (17027007929400).

Almost surely, 2^{221333222222021} is an apocalyptic number.

It is an amenable number.

221333222222021 is a deficient number, since it is larger than the sum of its proper divisors (51098904648379).

221333222222021 is a wasteful number, since it uses less digits than its factorization.

221333222222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196492988.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 221333222222021 its reverse (120222222333122), we get a palindrome (341555444555143).

The spelling of 221333222222021 in words is "two hundred twenty-one trillion, three hundred thirty-three billion, two hundred twenty-two million, two hundred twenty-two thousand, twenty-one".