2011201099965 has 96 divisors (see below), whose sum is σ = 3613186362240. Its totient is φ = 1034220441600.

The previous prime is 2011201099939. The next prime is 2011201099967. The reversal of 2011201099965 is 5699901021102.

It is not a de Polignac number, because 2011201099965 - 2⁵ = 2011201099933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2011201099965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011201099967) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 53812885 + ... + 53850245.

It is an arithmetic number, because the mean of its divisors is an integer number (37637357940).

Almost surely, 2^{2011201099965} is an apocalyptic number.

It is an amenable number.

2011201099965 is a deficient number, since it is larger than the sum of its proper divisors (1601985262275).

2011201099965 is a wasteful number, since it uses less digits than its factorization.

2011201099965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37755 (or 37752 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The spelling of 2011201099965 in words is "two trillion, eleven billion, two hundred one million, ninety-nine thousand, nine hundred sixty-five".