221232011 has 24 divisors (see below), whose sum is σ = 302352624. Its totient is φ = 159122880.

The previous prime is 221232001. The next prime is 221232031. The reversal of 221232011 is 110232122.

It is a happy number.

It is not a de Polignac number, because 221232011 - 2²² = 217037707 is a prime.

It is a super-2 number, since 2×221232011² = 97887205382208242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221232001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8780 + ... + 22793.

It is an arithmetic number, because the mean of its divisors is an integer number (12598026).

Almost surely, 2^221232011 is an apocalyptic number.

221232011 is a deficient number, since it is larger than the sum of its proper divisors (81120613).

221232011 is a wasteful number, since it uses less digits than its factorization.

221232011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31611 (or 31604 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221232011 is about 14873.8700747317. The cubic root of 221232011 is about 604.8058580680.

Adding to 221232011 its reverse (110232122), we get a palindrome (331464133).

It can be divided in two parts, 221 and 232011, that added together give a palindrome (232232).

The spelling of 221232011 in words is "two hundred twenty-one million, two hundred thirty-two thousand, eleven".