1001223013 has 4 divisors (see below), whose sum is σ = 1144254880. Its totient is φ = 858191148.

The previous prime is 1001223001. The next prime is 1001223017. The reversal of 1001223013 is 3103221001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3103221001 = 16333 ⋅189997.

It is a cyclic number.

It is not a de Polignac number, because 1001223013 - 2²¹ = 999125861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001222984 and 1001223002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001223017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71515923 + ... + 71515936.

It is an arithmetic number, because the mean of its divisors is an integer number (286063720).

Almost surely, 2^1001223013 is an apocalyptic number.

It is an amenable number.

1001223013 is a deficient number, since it is larger than the sum of its proper divisors (143031867).

1001223013 is an equidigital number, since it uses as much as digits as its factorization.

1001223013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143031866.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1001223013 is about 31642.1082262229. The cubic root of 1001223013 is about 1000.4075049172.

Adding to 1001223013 its reverse (3103221001), we get a palindrome (4104444014).

The spelling of 1001223013 in words is "one billion, one million, two hundred twenty-three thousand, thirteen".