1013444221 has 4 divisors (see below), whose sum is σ = 1035006912. Its totient is φ = 991881532.

The previous prime is 1013444213. The next prime is 1013444269. The reversal of 1013444221 is 1224443101.

It is a happy number.

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 1013444221 - 2³ = 1013444213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1013444192 and 1013444201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013444821) 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, 10781275 + ... + 10781368.

It is an arithmetic number, because the mean of its divisors is an integer number (258751728).

Almost surely, 2^1013444221 is an apocalyptic number.

It is an amenable number.

1013444221 is a deficient number, since it is larger than the sum of its proper divisors (21562691).

1013444221 is an equidigital number, since it uses as much as digits as its factorization.

1013444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21562690.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1013444221 is about 31834.6386974943. The cubic root of 1013444221 is about 1004.4614726602.

Adding to 1013444221 its reverse (1224443101), we get a palindrome (2237887322).

The spelling of 1013444221 in words is "one billion, thirteen million, four hundred forty-four thousand, two hundred twenty-one".