221000022011 has 4 divisors (see below), whose sum is σ = 221000975232. Its totient is φ = 220999068792.

The previous prime is 221000021993. The next prime is 221000022017. The reversal of 221000022011 is 110220000122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221000022011 - 2¹⁸ = 220999759867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000021983 and 221000022001.

It is not an unprimeable number, because it can be changed into a prime (221000022017) 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 3 ways as a sum of consecutive naturals, for example, 120605 + ... + 675681.

It is an arithmetic number, because the mean of its divisors is an integer number (55250243808).

Almost surely, 2^221000022011 is an apocalyptic number.

221000022011 is a deficient number, since it is larger than the sum of its proper divisors (953221).

221000022011 is an equidigital number, since it uses as much as digits as its factorization.

221000022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953220.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221000022011 its reverse (110220000122), we get a palindrome (331220022133).

The spelling of 221000022011 in words is "two hundred twenty-one billion, twenty-two thousand, eleven".