11111112210 has 128 divisors (see below), whose sum is σ = 30257971200. Its totient is φ = 2587403520.

The previous prime is 11111112209. The next prime is 11111112307. The reversal of 11111112210 is 1221111111.

It is a super-2 number, since 2×11111112210² (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 63 ways as a sum of consecutive naturals, for example, 958831 + ... + 970349.

It is an arithmetic number, because the mean of its divisors is an integer number (236390400).

Almost surely, 2^11111112210 is an apocalyptic number.

11111112210 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 11111112210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15128985600).

11111112210 is an abundant number, since it is smaller than the sum of its proper divisors (19146858990).

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

11111112210 is a wasteful number, since it uses less digits than its factorization.

11111112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11656.

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

Adding to 11111112210 its reverse (1221111111), we get a palindrome (12332223321).

It can be divided in two parts, 111111 and 12210, that added together give a palindrome (123321).

The spelling of 11111112210 in words is "eleven billion, one hundred eleven million, one hundred twelve thousand, two hundred ten".