11121111210 has 96 divisors (see below), whose sum is σ = 29427967296. Its totient is φ = 2687731200.

The previous prime is 11121111173. The next prime is 11121111247. The reversal of 11121111210 is 1211112111.

It is an interprime number because it is at equal distance from previous prime (11121111173) and next prime (11121111247).

It is a super-2 number, since 2×11121111210² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1218765 + ... + 1227855.

It is an arithmetic number, because the mean of its divisors is an integer number (306541326).

Almost surely, 2^11121111210 is an apocalyptic number.

11121111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11121111210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14713983648).

11121111210 is an abundant number, since it is smaller than the sum of its proper divisors (18306856086).

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

11121111210 is a wasteful number, since it uses less digits than its factorization.

11121111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9460 (or 9449 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11121111210 its reverse (1211112111), we get a palindrome (12332223321).

Subtracting from 11121111210 its reverse (1211112111), we obtain a palindrome (9909999099).

It can be divided in two parts, 1 and 1121111210, that added together give a palindrome (1121111211).

The spelling of 11121111210 in words is "eleven billion, one hundred twenty-one million, one hundred eleven thousand, two hundred ten".