230002021981 has 2 divisors, whose sum is σ = 230002021982. Its totient is φ = 230002021980.

The previous prime is 230002021973. The next prime is 230002022027. The reversal of 230002021981 is 189120200032.

230002021981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229024459225 + 977562756 = 478565^2 + 31266^2 .

It is a cyclic number.

It is not a de Polignac number, because 230002021981 - 2³ = 230002021973 is a prime.

It is a super-2 number, since 2×230002021981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230002021681) 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, 115001010990 + 115001010991.

It is an arithmetic number, because the mean of its divisors is an integer number (115001010991).

Almost surely, 2^230002021981 is an apocalyptic number.

It is an amenable number.

230002021981 is a deficient number, since it is larger than the sum of its proper divisors (1).

230002021981 is an equidigital number, since it uses as much as digits as its factorization.

230002021981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 230002021981 in words is "two hundred thirty billion, two million, twenty-one thousand, nine hundred eighty-one".