2161001035311 has 4 divisors (see below), whose sum is σ = 2881334713752. Its totient is φ = 1440667356872.

The previous prime is 2161001035289. The next prime is 2161001035313. The reversal of 2161001035311 is 1135301001612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2161001035311 - 2¹⁰ = 2161001034287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161001035313) 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, 360166839216 + ... + 360166839221.

It is an arithmetic number, because the mean of its divisors is an integer number (720333678438).

Almost surely, 2^{2161001035311} is an apocalyptic number.

2161001035311 is a deficient number, since it is larger than the sum of its proper divisors (720333678441).

2161001035311 is an equidigital number, since it uses as much as digits as its factorization.

2161001035311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720333678440.

The product of its (nonzero) digits is 540, while the sum is 24.

Adding to 2161001035311 its reverse (1135301001612), we get a palindrome (3296302036923).

The spelling of 2161001035311 in words is "two trillion, one hundred sixty-one billion, one million, thirty-five thousand, three hundred eleven".