54213222121 has 2 divisors, whose sum is σ = 54213222122. Its totient is φ = 54213222120.

The previous prime is 54213222113. The next prime is 54213222131. The reversal of 54213222121 is 12122231245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45054732121 + 9158490000 = 212261^2 + 95700^2 .

It is a cyclic number.

It is not a de Polignac number, because 54213222121 - 2³ = 54213222113 is a prime.

It is not a weakly prime, because it can be changed into another prime (54213222131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27106611060 + 27106611061.

It is an arithmetic number, because the mean of its divisors is an integer number (27106611061).

Almost surely, 2^54213222121 is an apocalyptic number.

It is an amenable number.

54213222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

54213222121 is an equidigital number, since it uses as much as digits as its factorization.

54213222121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

Adding to 54213222121 its reverse (12122231245), we get a palindrome (66335453366).

The spelling of 54213222121 in words is "fifty-four billion, two hundred thirteen million, two hundred twenty-two thousand, one hundred twenty-one".