1553030455121 has 2 divisors, whose sum is σ = 1553030455122. Its totient is φ = 1553030455120.

The previous prime is 1553030455111. The next prime is 1553030455129. The reversal of 1553030455121 is 1215540303551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1133500915600 + 419529539521 = 1064660^2 + 647711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553030455121 - 2²² = 1553026260817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1553030455129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776515227560 + 776515227561.

It is an arithmetic number, because the mean of its divisors is an integer number (776515227561).

Almost surely, 2^{1553030455121} is an apocalyptic number.

It is an amenable number.

1553030455121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553030455121 is an equidigital number, since it uses as much as digits as its factorization.

1553030455121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 35.

Adding to 1553030455121 its reverse (1215540303551), we get a palindrome (2768570758672).

The spelling of 1553030455121 in words is "one trillion, five hundred fifty-three billion, thirty million, four hundred fifty-five thousand, one hundred twenty-one".