1001221093 has 4 divisors (see below), whose sum is σ = 1053916960. Its totient is φ = 948525228.

The previous prime is 1001221063. The next prime is 1001221097. The reversal of 1001221093 is 3901221001.

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 a de Polignac number, because none of the positive numbers 2^k-1001221093 is a prime.

It is a super-2 number, since 2×1001221093² = 2004887354136229298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 52695847 = 1001221093 / (1 + 0 + 0 + 1 + 2 + 2 + 1 + 0 + 9 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001221093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001221097) 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, 26347905 + ... + 26347942.

It is an arithmetic number, because the mean of its divisors is an integer number (263479240).

Almost surely, 2^1001221093 is an apocalyptic number.

It is an amenable number.

1001221093 is a deficient number, since it is larger than the sum of its proper divisors (52695867).

1001221093 is an equidigital number, since it uses as much as digits as its factorization.

1001221093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52695866.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1001221093 is about 31642.0778868898. The cubic root of 1001221093 is about 1000.4068654381.

Adding to 1001221093 its reverse (3901221001), we get a palindrome (4902442094).

The spelling of 1001221093 in words is "one billion, one million, two hundred twenty-one thousand, ninety-three".