221011007 has 8 divisors (see below), whose sum is σ = 257350176. Its totient is φ = 185863392.

The previous prime is 221010971. The next prime is 221011057. The reversal of 221011007 is 700110122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221011007 - 2¹⁰ = 221009983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221010982 and 221011000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297488 + ... + 298229.

It is an arithmetic number, because the mean of its divisors is an integer number (32168772).

Almost surely, 2^221011007 is an apocalyptic number.

221011007 is a deficient number, since it is larger than the sum of its proper divisors (36339169).

221011007 is an equidigital number, since it uses as much as digits as its factorization.

221011007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595777.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 221011007 is about 14866.4389481812. The cubic root of 221011007 is about 604.6043967953.

Adding to 221011007 its reverse (700110122), we get a palindrome (921121129).

The spelling of 221011007 in words is "two hundred twenty-one million, eleven thousand, seven".