1001221002013 has 4 divisors (see below), whose sum is σ = 1001254451680. Its totient is φ = 1001187552348.

The previous prime is 1001221001993. The next prime is 1001221002121. The reversal of 1001221002013 is 3102001221001.

1001221002013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1001221002013 - 2⁵ = 1001221001981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001221001984 and 1001221002002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001221009013) 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, 16679895 + ... + 16739812.

It is an arithmetic number, because the mean of its divisors is an integer number (250313612920).

Almost surely, 2^{1001221002013} is an apocalyptic number.

It is an amenable number.

1001221002013 is a deficient number, since it is larger than the sum of its proper divisors (33449667).

1001221002013 is an equidigital number, since it uses as much as digits as its factorization.

1001221002013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33449666.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1001221002013 its reverse (3102001221001), we get a palindrome (4103222223014).

The spelling of 1001221002013 in words is "one trillion, one billion, two hundred twenty-one million, two thousand, thirteen".