54020552211221 has 4 divisors (see below), whose sum is σ = 54020595482700. Its totient is φ = 54020508939744.

The previous prime is 54020552211217. The next prime is 54020552211289. The reversal of 54020552211221 is 12211225502045.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14751667824100 + 39268884387121 = 3840790^2 + 6266489^2 .

It is a cyclic number.

It is not a de Polignac number, because 54020552211221 - 2² = 54020552211217 is a prime.

It is a super-2 number, since 2×54020552211221² (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 (54020552211721) 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, 19705736 + ... + 22279073.

It is an arithmetic number, because the mean of its divisors is an integer number (13505148870675).

Almost surely, 2^{54020552211221} is an apocalyptic number.

It is an amenable number.

54020552211221 is a deficient number, since it is larger than the sum of its proper divisors (43271479).

54020552211221 is a wasteful number, since it uses less digits than its factorization.

54020552211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43271478.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 54020552211221 its reverse (12211225502045), we get a palindrome (66231777713266).

The spelling of 54020552211221 in words is "fifty-four trillion, twenty billion, five hundred fifty-two million, two hundred eleven thousand, two hundred twenty-one".