1111221120210 has 64 divisors (see below), whose sum is σ = 2686562985600. Its totient is φ = 294147988992.

The previous prime is 1111221120193. The next prime is 1111221120221. The reversal of 1111221120210 is 120211221111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1111221120210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4683726 + ... + 4915254.

It is an arithmetic number, because the mean of its divisors is an integer number (41977546650).

Almost surely, 2^{1111221120210} is an apocalyptic number.

1111221120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1111221120210 is an abundant number, since it is smaller than the sum of its proper divisors (1575341865390).

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

1111221120210 is a wasteful number, since it uses less digits than its factorization.

1111221120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232715.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111221120210 its reverse (120211221111), we get a palindrome (1231432341321).

The spelling of 1111221120210 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, two hundred ten".