152121402221 has 2 divisors, whose sum is σ = 152121402222. Its totient is φ = 152121402220.

The previous prime is 152121402193. The next prime is 152121402227. The reversal of 152121402221 is 122204121251.

152121402221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123562092196 + 28559310025 = 351514^2 + 168995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152121402221 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 (152121402227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76060701110 + 76060701111.

It is an arithmetic number, because the mean of its divisors is an integer number (76060701111).

Almost surely, 2^152121402221 is an apocalyptic number.

It is an amenable number.

152121402221 is a deficient number, since it is larger than the sum of its proper divisors (1).

152121402221 is an equidigital number, since it uses as much as digits as its factorization.

152121402221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 152121402221 its reverse (122204121251), we get a palindrome (274325523472).

The spelling of 152121402221 in words is "one hundred fifty-two billion, one hundred twenty-one million, four hundred two thousand, two hundred twenty-one".