1111221122210 has 16 divisors (see below), whose sum is σ = 2000216026296. Its totient is φ = 444484447488.

The previous prime is 1111221122149. The next prime is 1111221122279. The reversal of 1111221122210 is 122211221111.

It can be written as a sum of positive squares in 4 ways, for example, as 966640946041 + 144580176169 = 983179^2 + 380237^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836234 + ... + 1709306.

Almost surely, 2^{1111221122210} is an apocalyptic number.

1111221122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1111221122210 is a deficient number, since it is larger than the sum of its proper divisors (888994904086).

1111221122210 is a wasteful number, since it uses less digits than its factorization.

1111221122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000357.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1111221122210 its reverse (122211221111), we get a palindrome (1233432343321).

The spelling of 1111221122210 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred ten".