1220432111 has 4 divisors (see below), whose sum is σ = 1284665400. Its totient is φ = 1156198824.

The previous prime is 1220432077. The next prime is 1220432119. The reversal of 1220432111 is 1112340221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1112340221 = 107 ⋅10395703.

It is a cyclic number.

It is not a de Polignac number, because 1220432111 - 2⁶ = 1220432047 is a prime.

It is a super-3 number, since 3×1220432111³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220432111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220432119) 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 3 ways as a sum of consecutive naturals, for example, 32116616 + ... + 32116653.

It is an arithmetic number, because the mean of its divisors is an integer number (321166350).

Almost surely, 2^1220432111 is an apocalyptic number.

1220432111 is a deficient number, since it is larger than the sum of its proper divisors (64233289).

1220432111 is an equidigital number, since it uses as much as digits as its factorization.

1220432111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64233288.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1220432111 is about 34934.6834964910. The cubic root of 1220432111 is about 1068.6558692058.

Adding to 1220432111 its reverse (1112340221), we get a palindrome (2332772332).

The spelling of 1220432111 in words is "one billion, two hundred twenty million, four hundred thirty-two thousand, one hundred eleven".