1101220515553 has 2 divisors, whose sum is σ = 1101220515554. Its totient is φ = 1101220515552.

The previous prime is 1101220515541. The next prime is 1101220515587. The reversal of 1101220515553 is 3555150221011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817635509824 + 283585005729 = 904232^2 + 532527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101220515553 is a prime.

It is a super-2 number, since 2×1101220515553² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1101220515523) 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, 550610257776 + 550610257777.

It is an arithmetic number, because the mean of its divisors is an integer number (550610257777).

Almost surely, 2^{1101220515553} is an apocalyptic number.

It is an amenable number.

1101220515553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101220515553 is an equidigital number, since it uses as much as digits as its factorization.

1101220515553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 31.

Adding to 1101220515553 its reverse (3555150221011), we get a palindrome (4656370736564).

The spelling of 1101220515553 in words is "one trillion, one hundred one billion, two hundred twenty million, five hundred fifteen thousand, five hundred fifty-three".