2001013121013 has 8 divisors (see below), whose sum is σ = 2668024252608. Its totient is φ = 1334005368384.

The previous prime is 2001013120987. The next prime is 2001013121047. The reversal of 2001013121013 is 3101213101002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001013121013 - 2²¹ = 2001011023861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001013120983 and 2001013121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001013121053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1356456 + ... + 2417022.

It is an arithmetic number, because the mean of its divisors is an integer number (333503031576).

Almost surely, 2^{2001013121013} is an apocalyptic number.

It is an amenable number.

2001013121013 is a deficient number, since it is larger than the sum of its proper divisors (667011131595).

2001013121013 is a wasteful number, since it uses less digits than its factorization.

2001013121013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689483.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 2001013121013 its reverse (3101213101002), we get a palindrome (5102226222015).

The spelling of 2001013121013 in words is "two trillion, one billion, thirteen million, one hundred twenty-one thousand, thirteen".