54220121 has 4 divisors (see below), whose sum is σ = 54234852. Its totient is φ = 54205392.

The previous prime is 54220087. The next prime is 54220139. The reversal of 54220121 is 12102245.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 48163600 + 6056521 = 6940^2 + 2461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54220121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 54220121.

It is not an unprimeable number, because it can be changed into a prime (54220141) 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, 3455 + ... + 10971.

It is an arithmetic number, because the mean of its divisors is an integer number (13558713).

Almost surely, 2^54220121 is an apocalyptic number.

It is an amenable number.

54220121 is a deficient number, since it is larger than the sum of its proper divisors (14731).

54220121 is an equidigital number, since it uses as much as digits as its factorization.

54220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14730.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 54220121 is about 7363.4313332848. The cubic root of 54220121 is about 378.4892021860.

Adding to 54220121 its reverse (12102245), we get a palindrome (66322366).

The spelling of 54220121 in words is "fifty-four million, two hundred twenty thousand, one hundred twenty-one".