2001021070065 has 16 divisors (see below), whose sum is σ = 3215990819328. Its totient is φ = 1062425534976.

The previous prime is 2001021070049. The next prime is 2001021070123. The reversal of 2001021070065 is 5600701201002.

It is not a de Polignac number, because 2001021070065 - 2⁴ = 2001021070049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299102944 + ... + 299109633.

It is an arithmetic number, because the mean of its divisors is an integer number (200999426208).

Almost surely, 2^{2001021070065} is an apocalyptic number.

It is an amenable number.

2001021070065 is a deficient number, since it is larger than the sum of its proper divisors (1214969749263).

2001021070065 is a wasteful number, since it uses less digits than its factorization.

2001021070065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598212808.

The product of its (nonzero) digits is 840, while the sum is 24.

Adding to 2001021070065 its reverse (5600701201002), we get a palindrome (7601722271067).

The spelling of 2001021070065 in words is "two trillion, one billion, twenty-one million, seventy thousand, sixty-five".