1001012213 has 4 divisors (see below), whose sum is σ = 1006604640. Its totient is φ = 995419788.

The previous prime is 1001012203. The next prime is 1001012237. The reversal of 1001012213 is 3122101001.

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 1001012213 - 2⁴ = 1001012197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001012194 and 1001012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001012203) 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, 2795945 + ... + 2796302.

It is an arithmetic number, because the mean of its divisors is an integer number (251651160).

Almost surely, 2^1001012213 is an apocalyptic number.

It is an amenable number.

1001012213 is a deficient number, since it is larger than the sum of its proper divisors (5592427).

1001012213 is an equidigital number, since it uses as much as digits as its factorization.

1001012213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5592426.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1001012213 is about 31638.7770465295. Note that the first 3 decimals coincide. The cubic root of 1001012213 is about 1000.3372905556.

Adding to 1001012213 its reverse (3122101001), we get a palindrome (4123113214).

The spelling of 1001012213 in words is "one billion, one million, twelve thousand, two hundred thirteen".