1220011123 has 2 divisors, whose sum is σ = 1220011124. Its totient is φ = 1220011122.

The previous prime is 1220011097. The next prime is 1220011139. The reversal of 1220011123 is 3211100221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220011123 is a prime.

It is a super-2 number, since 2×1220011123² = 2976854280487442258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220011183) 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 as a sum of consecutive naturals, namely, 610005561 + 610005562.

It is an arithmetic number, because the mean of its divisors is an integer number (610005562).

Almost surely, 2^1220011123 is an apocalyptic number.

1220011123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220011123 is an equidigital number, since it uses as much as digits as its factorization.

1220011123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1220011123 is about 34928.6576180649. The cubic root of 1220011123 is about 1068.5329774768.

Adding to 1220011123 its reverse (3211100221), we get a palindrome (4431111344).

The spelling of 1220011123 in words is "one billion, two hundred twenty million, eleven thousand, one hundred twenty-three".