221010109 has 4 divisors (see below), whose sum is σ = 232642240. Its totient is φ = 209377980.

The previous prime is 221010107. The next prime is 221010113. The reversal of 221010109 is 901010122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221010109 - 2¹ = 221010107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221010092 and 221010101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010107) 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, 5816037 + ... + 5816074.

It is an arithmetic number, because the mean of its divisors is an integer number (58160560).

Almost surely, 2^221010109 is an apocalyptic number.

It is an amenable number.

221010109 is a deficient number, since it is larger than the sum of its proper divisors (11632131).

221010109 is a wasteful number, since it uses less digits than its factorization.

221010109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11632130.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 221010109 is about 14866.4087458942. The cubic root of 221010109 is about 604.6035779288.

The spelling of 221010109 in words is "two hundred twenty-one million, ten thousand, one hundred nine".