1220551053257 has 2 divisors, whose sum is σ = 1220551053258. Its totient is φ = 1220551053256.

The previous prime is 1220551053187. The next prime is 1220551053329. The reversal of 1220551053257 is 7523501550221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1141358902336 + 79192150921 = 1068344^2 + 281411^2 .

It is an emirp because it is prime and its reverse (7523501550221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220551053257 - 2³⁴ = 1203371184073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220551053257.

It is not a weakly prime, because it can be changed into another prime (1220551055257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610275526628 + 610275526629.

It is an arithmetic number, because the mean of its divisors is an integer number (610275526629).

Almost surely, 2^{1220551053257} is an apocalyptic number.

It is an amenable number.

1220551053257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220551053257 is an equidigital number, since it uses as much as digits as its factorization.

1220551053257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105000, while the sum is 38.

The spelling of 1220551053257 in words is "one trillion, two hundred twenty billion, five hundred fifty-one million, fifty-three thousand, two hundred fifty-seven".