1220551053329 has 2 divisors, whose sum is σ = 1220551053330. Its totient is φ = 1220551053328.

The previous prime is 1220551053257. The next prime is 1220551053389. The reversal of 1220551053329 is 9233501550221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1150421420929 + 70129632400 = 1072577^2 + 264820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220551053329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220551053292 and 1220551053301.

It is not a weakly prime, because it can be changed into another prime (1220551053389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610275526664 + 610275526665.

It is an arithmetic number, because the mean of its divisors is an integer number (610275526665).

Almost surely, 2^{1220551053329} is an apocalyptic number.

It is an amenable number.

1220551053329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220551053329 is an equidigital number, since it uses as much as digits as its factorization.

1220551053329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 1220551053329 in words is "one trillion, two hundred twenty billion, five hundred fifty-one million, fifty-three thousand, three hundred twenty-nine".