811111120021002 has 32 divisors (see below), whose sum is σ = 1659999107999232. Its totient is φ = 264074613297264.

The previous prime is 811111120021001. The next prime is 811111120021049. The reversal of 811111120021002 is 200120021111118.

It is a super-2 number, since 2×811111120021002² (a number of 31 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 811111120021002.

It is not an unprimeable number, because it can be changed into a prime (811111120021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39622278 + ... + 56499089.

It is an arithmetic number, because the mean of its divisors is an integer number (51874972124976).

Almost surely, 2^{811111120021002} is an apocalyptic number.

811111120021002 is an abundant number, since it is smaller than the sum of its proper divisors (848887987978230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811111120021002 is a wasteful number, since it uses less digits than its factorization.

811111120021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96154122.

The product of its (nonzero) digits is 64, while the sum is 21.

The spelling of 811111120021002 in words is "eight hundred eleven trillion, one hundred eleven billion, one hundred twenty million, twenty-one thousand, two".