8121111210 has 48 divisors (see below), whose sum is σ = 21125089440. Its totient is φ = 2164583520.

The previous prime is 8121111209. The next prime is 8121111223. The reversal of 8121111210 is 121111218.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175405 + ... + 216815.

It is an arithmetic number, because the mean of its divisors is an integer number (440106030).

Almost surely, 2^8121111210 is an apocalyptic number.

8121111210 is an abundant number, since it is smaller than the sum of its proper divisors (13003978230).

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

8121111210 is a wasteful number, since it uses less digits than its factorization.

8121111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43603 (or 43600 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

The square root of 8121111210 is about 90117.2081791264. The cubic root of 8121111210 is about 2010.0420946111.

Adding to 8121111210 its reverse (121111218), we get a palindrome (8242222428).

The spelling of 8121111210 in words is "eight billion, one hundred twenty-one million, one hundred eleven thousand, two hundred ten".