2001002131345 has 64 divisors (see below), whose sum is σ = 2833595965440. Its totient is φ = 1327847254272.

The previous prime is 2001002131343. The next prime is 2001002131357. The reversal of 2001002131345 is 5431312001002.

It is a happy number.

It is not a de Polignac number, because 2001002131345 - 2¹ = 2001002131343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001002131343) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 293097822 + ... + 293104648.

It is an arithmetic number, because the mean of its divisors is an integer number (44274936960).

Almost surely, 2^{2001002131345} is an apocalyptic number.

It is an amenable number.

2001002131345 is a deficient number, since it is larger than the sum of its proper divisors (832593834095).

2001002131345 is a wasteful number, since it uses less digits than its factorization.

2001002131345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8062.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 2001002131345 its reverse (5431312001002), we get a palindrome (7432314132347).

The spelling of 2001002131345 in words is "two trillion, one billion, two million, one hundred thirty-one thousand, three hundred forty-five".