1220002057 has 2 divisors, whose sum is σ = 1220002058. Its totient is φ = 1220002056.

The previous prime is 1220002051. The next prime is 1220002081. The reversal of 1220002057 is 7502000221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 882030601 + 337971456 = 29699^2 + 18384^2 .

It is an emirp because it is prime and its reverse (7502000221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220002057 - 2⁷ = 1220001929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220002051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610001028 + 610001029.

It is an arithmetic number, because the mean of its divisors is an integer number (610001029).

Almost surely, 2^1220002057 is an apocalyptic number.

It is an amenable number.

1220002057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220002057 is an equidigital number, since it uses as much as digits as its factorization.

1220002057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 1220002057 is about 34928.5278390029. The cubic root of 1220002057 is about 1068.5303306856.

Adding to 1220002057 its reverse (7502000221), we get a palindrome (8722002278).

The spelling of 1220002057 in words is "one billion, two hundred twenty million, two thousand, fifty-seven".