221122011 has 16 divisors (see below), whose sum is σ = 326907648. Its totient is φ = 131815200.

The previous prime is 221122003. The next prime is 221122049. The reversal of 221122011 is 110221122.

It is not a de Polignac number, because 221122011 - 2³ = 221122003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221122091) 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, 52911 + ... + 56936.

It is an arithmetic number, because the mean of its divisors is an integer number (20431728).

Almost surely, 2^221122011 is an apocalyptic number.

221122011 is a deficient number, since it is larger than the sum of its proper divisors (105785637).

221122011 is a wasteful number, since it uses less digits than its factorization.

221122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109922.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 221122011 is about 14870.1718550930. The cubic root of 221122011 is about 604.7056018204.

Adding to 221122011 its reverse (110221122), we get a palindrome (331343133).

The spelling of 221122011 in words is "two hundred twenty-one million, one hundred twenty-two thousand, eleven".