221111030 has 48 divisors (see below), whose sum is σ = 472879296. Its totient is φ = 74188800.

The previous prime is 221111021. The next prime is 221111039. The reversal of 221111030 is 30111122.

221111030 = T₁₇₀₀ + T₁₇₀₁ + ... + T₁₈₄₀.

221111030 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221111021) and next prime (221111039).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18230 + ... + 27830.

It is an arithmetic number, because the mean of its divisors is an integer number (9851652).

Almost surely, 2^221111030 is an apocalyptic number.

221111030 is an abundant number, since it is smaller than the sum of its proper divisors (251768266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221111030 is a wasteful number, since it uses less digits than its factorization.

221111030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9669 (or 9662 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 221111030 is about 14869.8026214204. The cubic root of 221111030 is about 604.6955916875.

Adding to 221111030 its reverse (30111122), we get a palindrome (251222152).

The spelling of 221111030 in words is "two hundred twenty-one million, one hundred eleven thousand, thirty".