1111221203210 has 16 divisors (see below), whose sum is σ = 2117856881736. Its totient is φ = 418342099968.

The previous prime is 1111221203207. The next prime is 1111221203293. The reversal of 1111221203210 is 123021221111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1031754157009 + 79467046201 = 1015753^2 + 281899^2 .

It is a super-2 number, since 2×1111221203210² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 7 ways as a sum of consecutive naturals, for example, 3268297487 + ... + 3268297826.

Almost surely, 2^{1111221203210} is an apocalyptic number.

1111221203210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1111221203210 is a deficient number, since it is larger than the sum of its proper divisors (1006635678526).

1111221203210 is a wasteful number, since it uses less digits than its factorization.

1111221203210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6536595337.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1111221203210 its reverse (123021221111), we get a palindrome (1234242424321).

The spelling of 1111221203210 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred three thousand, two hundred ten".