1000013221 has 8 divisors (see below), whose sum is σ = 1042495488. Its totient is φ = 958170000.

The previous prime is 1000013213. The next prime is 1000013237. The reversal of 1000013221 is 1223100001.

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 1000013221 - 2³ = 1000013213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000013198 and 1000013207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000013921) 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, 156565 + ... + 162826.

It is an arithmetic number, because the mean of its divisors is an integer number (130311936).

Almost surely, 2^1000013221 is an apocalyptic number.

It is an amenable number.

1000013221 is a deficient number, since it is larger than the sum of its proper divisors (42482267).

1000013221 is a wasteful number, since it uses less digits than its factorization.

1000013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319523.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1000013221 is about 31622.9856433576. The cubic root of 1000013221 is about 1000.0044069806.

Adding to 1000013221 its reverse (1223100001), we get a palindrome (2223113222).

The spelling of 1000013221 in words is "one billion, thirteen thousand, two hundred twenty-one".