1220124643 has 2 divisors, whose sum is σ = 1220124644. Its totient is φ = 1220124642.

The previous prime is 1220124641. The next prime is 1220124671. The reversal of 1220124643 is 3464210221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220124643 - 2¹ = 1220124641 is a prime.

Together with 1220124641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1220124641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610062321 + 610062322.

It is an arithmetic number, because the mean of its divisors is an integer number (610062322).

Almost surely, 2^1220124643 is an apocalyptic number.

1220124643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220124643 is an equidigital number, since it uses as much as digits as its factorization.

1220124643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1220124643 is about 34930.2826069301. The cubic root of 1220124643 is about 1068.5661181860.

Adding to 1220124643 its reverse (3464210221), we get a palindrome (4684334864).

The spelling of 1220124643 in words is "one billion, two hundred twenty million, one hundred twenty-four thousand, six hundred forty-three".