1001020013 has 4 divisors (see below), whose sum is σ = 1144022880. Its totient is φ = 858017148.

The previous prime is 1001020003. The next prime is 1001020021. The reversal of 1001020013 is 3100201001.

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: 3100201001 = 173 ⋅17920237.

It is a cyclic number.

It is not a de Polignac number, because 1001020013 - 2¹⁶ = 1000954477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001020003) 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, 71501423 + ... + 71501436.

It is an arithmetic number, because the mean of its divisors is an integer number (286005720).

Almost surely, 2^1001020013 is an apocalyptic number.

It is an amenable number.

1001020013 is a deficient number, since it is larger than the sum of its proper divisors (143002867).

1001020013 is an equidigital number, since it uses as much as digits as its factorization.

1001020013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143002866.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1001020013 is about 31638.9003127479. The cubic root of 1001020013 is about 1000.3398887959.

Adding to 1001020013 its reverse (3100201001), we get a palindrome (4101221014).

The spelling of 1001020013 in words is "one billion, one million, twenty thousand, thirteen".