54521222350421 has 2 divisors, whose sum is σ = 54521222350422. Its totient is φ = 54521222350420.

The previous prime is 54521222350369. The next prime is 54521222350477. The reversal of 54521222350421 is 12405322212545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53261373245521 + 1259849104900 = 7298039^2 + 1122430^2 .

It is a cyclic number.

It is not a de Polignac number, because 54521222350421 - 2¹⁴ = 54521222334037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54521222353421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27260611175210 + 27260611175211.

It is an arithmetic number, because the mean of its divisors is an integer number (27260611175211).

Almost surely, 2^{54521222350421} is an apocalyptic number.

It is an amenable number.

54521222350421 is a deficient number, since it is larger than the sum of its proper divisors (1).

54521222350421 is an equidigital number, since it uses as much as digits as its factorization.

54521222350421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 54521222350421 its reverse (12405322212545), we get a palindrome (66926544562966).

The spelling of 54521222350421 in words is "fifty-four trillion, five hundred twenty-one billion, two hundred twenty-two million, three hundred fifty thousand, four hundred twenty-one".