220222002521 has 2 divisors, whose sum is σ = 220222002522. Its totient is φ = 220222002520.

The previous prime is 220222002461. The next prime is 220222002529. The reversal of 220222002521 is 125200222022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218009617225 + 2212385296 = 466915^2 + 47036^2 .

It is a cyclic number.

It is not a de Polignac number, because 220222002521 - 2¹⁰ = 220222001497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220222002493 and 220222002502.

It is not a weakly prime, because it can be changed into another prime (220222002529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110111001260 + 110111001261.

It is an arithmetic number, because the mean of its divisors is an integer number (110111001261).

Almost surely, 2^220222002521 is an apocalyptic number.

It is an amenable number.

220222002521 is a deficient number, since it is larger than the sum of its proper divisors (1).

220222002521 is an equidigital number, since it uses as much as digits as its factorization.

220222002521 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 20.

Adding to 220222002521 its reverse (125200222022), we get a palindrome (345422224543).

The spelling of 220222002521 in words is "two hundred twenty billion, two hundred twenty-two million, two thousand, five hundred twenty-one".