55010516501221 has 4 divisors (see below), whose sum is σ = 55154147092992. Its totient is φ = 54866885909452.

The previous prime is 55010516501179. The next prime is 55010516501323. The reversal of 55010516501221 is 12210561501055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55010516501221 - 2¹³ = 55010516493029 is a prime.

It is a super-2 number, since 2×55010516501221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55010516541221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71815295311 + ... + 71815296076.

It is an arithmetic number, because the mean of its divisors is an integer number (13788536773248).

Almost surely, 2^{55010516501221} is an apocalyptic number.

It is an amenable number.

55010516501221 is a deficient number, since it is larger than the sum of its proper divisors (143630591771).

55010516501221 is a wasteful number, since it uses less digits than its factorization.

55010516501221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143630591770.

The product of its (nonzero) digits is 15000, while the sum is 34.

The spelling of 55010516501221 in words is "fifty-five trillion, ten billion, five hundred sixteen million, five hundred one thousand, two hundred twenty-one".