1200301981 has 2 divisors, whose sum is σ = 1200301982. Its totient is φ = 1200301980.

The previous prime is 1200301969. The next prime is 1200302023. The reversal of 1200301981 is 1891030021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631717956 + 568584025 = 25134^2 + 23845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200301981 - 2⁹ = 1200301469 is a prime.

It is a super-2 number, since 2×1200301981² = 2881449691185048722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200341981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600150990 + 600150991.

It is an arithmetic number, because the mean of its divisors is an integer number (600150991).

Almost surely, 2^1200301981 is an apocalyptic number.

It is an amenable number.

1200301981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200301981 is an equidigital number, since it uses as much as digits as its factorization.

1200301981 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 1200301981 is about 34645.3745974841. The cubic root of 1200301981 is about 1062.7477013445.

The spelling of 1200301981 in words is "one billion, two hundred million, three hundred one thousand, nine hundred eighty-one".