1220554533349 has 2 divisors, whose sum is σ = 1220554533350. Its totient is φ = 1220554533348.

The previous prime is 1220554533337. The next prime is 1220554533379. The reversal of 1220554533349 is 9433354550221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1171141689249 + 49412844100 = 1082193^2 + 222290^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220554533349 - 2³⁷ = 1083115579877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220554533299 and 1220554533308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220554533379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610277266674 + 610277266675.

It is an arithmetic number, because the mean of its divisors is an integer number (610277266675).

Almost surely, 2^{1220554533349} is an apocalyptic number.

It is an amenable number.

1220554533349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220554533349 is an equidigital number, since it uses as much as digits as its factorization.

1220554533349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 1220554533349 in words is "one trillion, two hundred twenty billion, five hundred fifty-four million, five hundred thirty-three thousand, three hundred forty-nine".