1030201981 has 2 divisors, whose sum is σ = 1030201982. Its totient is φ = 1030201980.

The previous prime is 1030201979. The next prime is 1030201999. The reversal of 1030201981 is 1891020301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 945009081 + 85192900 = 30741^2 + 9230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030201981 - 2¹ = 1030201979 is a prime.

It is a super-2 number, since 2×1030201981² = 2122632243312648722, which contains 22 as substring.

Together with 1030201979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1030201681) 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, 515100990 + 515100991.

It is an arithmetic number, because the mean of its divisors is an integer number (515100991).

Almost surely, 2^1030201981 is an apocalyptic number.

It is an amenable number.

1030201981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1030201981 is an equidigital number, since it uses as much as digits as its factorization.

1030201981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1030201981 is about 32096.7596651126. The cubic root of 1030201981 is about 1009.9676429852.

The spelling of 1030201981 in words is "one billion, thirty million, two hundred one thousand, nine hundred eighty-one".