221323210153 has 2 divisors, whose sum is σ = 221323210154. Its totient is φ = 221323210152.

The previous prime is 221323210151. The next prime is 221323210159. The reversal of 221323210153 is 351012323122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201249137664 + 20074072489 = 448608^2 + 141683^2 .

It is a cyclic number.

It is not a de Polignac number, because 221323210153 - 2¹ = 221323210151 is a prime.

Together with 221323210151, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221323210151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110661605076 + 110661605077.

It is an arithmetic number, because the mean of its divisors is an integer number (110661605077).

Almost surely, 2^221323210153 is an apocalyptic number.

It is an amenable number.

221323210153 is a deficient number, since it is larger than the sum of its proper divisors (1).

221323210153 is an equidigital number, since it uses as much as digits as its factorization.

221323210153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 221323210153 its reverse (351012323122), we get a palindrome (572335533275).

The spelling of 221323210153 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred ten thousand, one hundred fifty-three".