221022221011 has 4 divisors (see below), whose sum is σ = 221599302912. Its totient is φ = 220445139112.

The previous prime is 221022220831. The next prime is 221022221027. The reversal of 221022221011 is 110122220122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221022221011 - 2³¹ = 218874737363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221022221051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288540376 + ... + 288541141.

It is an arithmetic number, because the mean of its divisors is an integer number (55399825728).

Almost surely, 2^221022221011 is an apocalyptic number.

221022221011 is a deficient number, since it is larger than the sum of its proper divisors (577081901).

221022221011 is an equidigital number, since it uses as much as digits as its factorization.

221022221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577081900.

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

Adding to 221022221011 its reverse (110122220122), we get a palindrome (331144441133).

The spelling of 221022221011 in words is "two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, eleven".