2081398021011 has 16 divisors (see below), whose sum is σ = 3083587444000. Its totient is φ = 1387583011584.

The previous prime is 2081398021007. The next prime is 2081398021033. The reversal of 2081398021011 is 1101208931802.

It is a happy number.

It is not a de Polignac number, because 2081398021011 - 2² = 2081398021007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081398021411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2316315 + ... + 3086763.

It is an arithmetic number, because the mean of its divisors is an integer number (192724215250).

Almost surely, 2^{2081398021011} is an apocalyptic number.

2081398021011 is a deficient number, since it is larger than the sum of its proper divisors (1002189422989).

2081398021011 is a wasteful number, since it uses less digits than its factorization.

2081398021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870515 (or 870509 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 2081398021011 in words is "two trillion, eighty-one billion, three hundred ninety-eight million, twenty-one thousand, eleven".