5515155221101 has 2 divisors, whose sum is σ = 5515155221102. Its totient is φ = 5515155221100.

The previous prime is 5515155221099. The next prime is 5515155221131. The reversal of 5515155221101 is 1011225515155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5497125714025 + 18029507076 = 2344595^2 + 134274^2 .

It is a cyclic number.

It is not a de Polignac number, because 5515155221101 - 2¹ = 5515155221099 is a prime.

It is a super-3 number, since 3×5515155221101³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 5515155221099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5515155221131) 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, 2757577610550 + 2757577610551.

It is an arithmetic number, because the mean of its divisors is an integer number (2757577610551).

Almost surely, 2^{5515155221101} is an apocalyptic number.

It is an amenable number.

5515155221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

5515155221101 is an equidigital number, since it uses as much as digits as its factorization.

5515155221101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12500, while the sum is 34.

The spelling of 5515155221101 in words is "five trillion, five hundred fifteen billion, one hundred fifty-five million, two hundred twenty-one thousand, one hundred one".