1001213403 has 4 divisors (see below), whose sum is σ = 1334951208. Its totient is φ = 667475600.

The previous prime is 1001213401. The next prime is 1001213441. The reversal of 1001213403 is 3043121001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001213403 - 2¹ = 1001213401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001213401) 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, 166868898 + ... + 166868903.

It is an arithmetic number, because the mean of its divisors is an integer number (333737802).

Almost surely, 2^1001213403 is an apocalyptic number.

1001213403 is a deficient number, since it is larger than the sum of its proper divisors (333737805).

1001213403 is an equidigital number, since it uses as much as digits as its factorization.

1001213403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333737804.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1001213403 is about 31641.9563712486. The cubic root of 1001213403 is about 1000.4043041828.

Adding to 1001213403 its reverse (3043121001), we get a palindrome (4044334404).

The spelling of 1001213403 in words is "one billion, one million, two hundred thirteen thousand, four hundred three".