2001312231101 has 4 divisors (see below), whose sum is σ = 2001315073632. Its totient is φ = 2001309388572.

The previous prime is 2001312231059. The next prime is 2001312231119. The reversal of 2001312231101 is 1011322131002.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2001312231101 - 2¹⁴ = 2001312214717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001312231101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001312234101) 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, 505610 + ... + 2063556.

It is an arithmetic number, because the mean of its divisors is an integer number (500328768408).

Almost surely, 2^{2001312231101} is an apocalyptic number.

It is an amenable number.

2001312231101 is a deficient number, since it is larger than the sum of its proper divisors (2842531).

2001312231101 is a wasteful number, since it uses less digits than its factorization.

2001312231101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842530.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 2001312231101 its reverse (1011322131002), we get a palindrome (3012634362103).

The spelling of 2001312231101 in words is "two trillion, one billion, three hundred twelve million, two hundred thirty-one thousand, one hundred one".