1220044111 has 16 divisors (see below), whose sum is σ = 1435529088. Its totient is φ = 1022248800.

The previous prime is 1220044097. The next prime is 1220044127. The reversal of 1220044111 is 1114400221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220044111 - 2¹¹ = 1220042063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220044171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92640 + ... + 104986.

It is an arithmetic number, because the mean of its divisors is an integer number (89720568).

Almost surely, 2^1220044111 is an apocalyptic number.

1220044111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220044111 is a deficient number, since it is larger than the sum of its proper divisors (215484977).

1220044111 is a wasteful number, since it uses less digits than its factorization.

1220044111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13062.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1220044111 is about 34929.1298345664. The cubic root of 1220044111 is about 1068.5426081125.

Adding to 1220044111 its reverse (1114400221), we get a palindrome (2334444332).

The spelling of 1220044111 in words is "one billion, two hundred twenty million, forty-four thousand, one hundred eleven".