55020015121611 has 4 divisors (see below), whose sum is σ = 73360020162152. Its totient is φ = 36680010081072.

The previous prime is 55020015121609. The next prime is 55020015121639. The reversal of 55020015121611 is 11612151002055.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55020015121611 - 2¹ = 55020015121609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55020015121651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9170002520266 + ... + 9170002520271.

It is an arithmetic number, because the mean of its divisors is an integer number (18340005040538).

Almost surely, 2^{55020015121611} is an apocalyptic number.

55020015121611 is a deficient number, since it is larger than the sum of its proper divisors (18340005040541).

55020015121611 is a wasteful number, since it uses less digits than its factorization.

55020015121611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18340005040540.

The product of its (nonzero) digits is 3000, while the sum is 30.

Adding to 55020015121611 its reverse (11612151002055), we get a palindrome (66632166123666).

The spelling of 55020015121611 in words is "fifty-five trillion, twenty billion, fifteen million, one hundred twenty-one thousand, six hundred eleven".