221122021011 has 4 divisors (see below), whose sum is σ = 294829361352. Its totient is φ = 147414680672.

The previous prime is 221122021009. The next prime is 221122021063. The reversal of 221122021011 is 110120221122.

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 221122021011 - 2¹ = 221122021009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221122021711) 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, 36853670166 + ... + 36853670171.

It is an arithmetic number, because the mean of its divisors is an integer number (73707340338).

Almost surely, 2^221122021011 is an apocalyptic number.

221122021011 is a deficient number, since it is larger than the sum of its proper divisors (73707340341).

221122021011 is an equidigital number, since it uses as much as digits as its factorization.

221122021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73707340340.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221122021011 its reverse (110120221122), we get a palindrome (331242242133).

The spelling of 221122021011 in words is "two hundred twenty-one billion, one hundred twenty-two million, twenty-one thousand, eleven".