221101233 has 32 divisors (see below), whose sum is σ = 326605440. Its totient is φ = 132503040.

The previous prime is 221101219. The next prime is 221101247. The reversal of 221101233 is 332101122.

It is an interprime number because it is at equal distance from previous prime (221101219) and next prime (221101247).

It is not a de Polignac number, because 221101233 - 2⁴ = 221101217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221101253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85191 + ... + 87747.

It is an arithmetic number, because the mean of its divisors is an integer number (10206420).

Almost surely, 2^221101233 is an apocalyptic number.

It is an amenable number.

221101233 is a deficient number, since it is larger than the sum of its proper divisors (105504207).

221101233 is a wasteful number, since it uses less digits than its factorization.

221101233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 221101233 is about 14869.4731917442. The cubic root of 221101233 is about 604.6866605935.

Adding to 221101233 its reverse (332101122), we get a palindrome (553202355).

The spelling of 221101233 in words is "two hundred twenty-one million, one hundred one thousand, two hundred thirty-three".