1220100443 has 2 divisors, whose sum is σ = 1220100444. Its totient is φ = 1220100442.

The previous prime is 1220100433. The next prime is 1220100451. The reversal of 1220100443 is 3440010221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220100443 - 2⁸ = 1220100187 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1220100403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610050221 + 610050222.

It is an arithmetic number, because the mean of its divisors is an integer number (610050222).

Almost surely, 2^1220100443 is an apocalyptic number.

1220100443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220100443 is an equidigital number, since it uses as much as digits as its factorization.

1220100443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1220100443 is about 34929.9362009151. The cubic root of 1220100443 is about 1068.5590534785.

Adding to 1220100443 its reverse (3440010221), we get a palindrome (4660110664).

The spelling of 1220100443 in words is "one billion, two hundred twenty million, one hundred thousand, four hundred forty-three".