60018351857221 has 2 divisors, whose sum is σ = 60018351857222. Its totient is φ = 60018351857220.

The previous prime is 60018351857141. The next prime is 60018351857249. The reversal of 60018351857221 is 12275815381006.

60018351857221 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., 46344915444100 + 13673436413121 = 6807710^2 + 3697761^2 .

It is a cyclic number.

It is not a de Polignac number, because 60018351857221 - 2⁹ = 60018351856709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60018351857021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30009175928610 + 30009175928611.

It is an arithmetic number, because the mean of its divisors is an integer number (30009175928611).

Almost surely, 2^{60018351857221} is an apocalyptic number.

It is an amenable number.

60018351857221 is a deficient number, since it is larger than the sum of its proper divisors (1).

60018351857221 is an equidigital number, since it uses as much as digits as its factorization.

60018351857221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 60018351857221 in words is "sixty trillion, eighteen billion, three hundred fifty-one million, eight hundred fifty-seven thousand, two hundred twenty-one".