1220123132057 has 2 divisors, whose sum is σ = 1220123132058. Its totient is φ = 1220123132056.

The previous prime is 1220123132023. The next prime is 1220123132071. The reversal of 1220123132057 is 7502313210221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1141519159561 + 78603972496 = 1068419^2 + 280364^2 .

It is an emirp because it is prime and its reverse (7502313210221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220123132057 - 2¹⁰ = 1220123131033 is a prime.

It is a super-2 number, since 2×1220123132057² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220123132077) 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, 610061566028 + 610061566029.

It is an arithmetic number, because the mean of its divisors is an integer number (610061566029).

Almost surely, 2^{1220123132057} is an apocalyptic number.

It is an amenable number.

1220123132057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220123132057 is an equidigital number, since it uses as much as digits as its factorization.

1220123132057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 1220123132057 its reverse (7502313210221), we get a palindrome (8722436342278).

The spelling of 1220123132057 in words is "one trillion, two hundred twenty billion, one hundred twenty-three million, one hundred thirty-two thousand, fifty-seven".