224120201521 has 2 divisors, whose sum is σ = 224120201522. Its totient is φ = 224120201520.

The previous prime is 224120201483. The next prime is 224120201527. The reversal of 224120201521 is 125102021422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220088586496 + 4031615025 = 469136^2 + 63495^2 .

It is a cyclic number.

It is not a de Polignac number, because 224120201521 - 2¹⁹ = 224119677233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224120201492 and 224120201501.

It is not a weakly prime, because it can be changed into another prime (224120201527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112060100760 + 112060100761.

It is an arithmetic number, because the mean of its divisors is an integer number (112060100761).

Almost surely, 2^224120201521 is an apocalyptic number.

It is an amenable number.

224120201521 is a deficient number, since it is larger than the sum of its proper divisors (1).

224120201521 is an equidigital number, since it uses as much as digits as its factorization.

224120201521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 224120201521 its reverse (125102021422), we get a palindrome (349222222943).

The spelling of 224120201521 in words is "two hundred twenty-four billion, one hundred twenty million, two hundred one thousand, five hundred twenty-one".