1220012111 has 8 divisors (see below), whose sum is σ = 1224637248. Its totient is φ = 1215396000.

The previous prime is 1220012093. The next prime is 1220012119. The reversal of 1220012111 is 1112100221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220012111 is a prime.

It is a super-3 number, since 3×1220012111³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220012092 and 1220012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220012119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381941 + ... + 385121.

It is an arithmetic number, because the mean of its divisors is an integer number (153079656).

Almost surely, 2^1220012111 is an apocalyptic number.

1220012111 is a deficient number, since it is larger than the sum of its proper divisors (4625137).

1220012111 is an equidigital number, since it uses as much as digits as its factorization.

1220012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4513.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1220012111 is about 34928.6717611764. The cubic root of 1220012111 is about 1068.5332659196.

Adding to 1220012111 its reverse (1112100221), we get a palindrome (2332112332).

The spelling of 1220012111 in words is "one billion, two hundred twenty million, twelve thousand, one hundred eleven".