1200202981 has 2 divisors, whose sum is σ = 1200202982. Its totient is φ = 1200202980.

The previous prime is 1200202931. The next prime is 1200203047. The reversal of 1200202981 is 1892020021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1118300481 + 81902500 = 33441^2 + 9050^2 .

It is an emirp because it is prime and its reverse (1892020021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200202981 - 2⁷ = 1200202853 is a prime.

It is a super-2 number, since 2×1200202981² = 2880974391202572722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200202931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600101490 + 600101491.

It is an arithmetic number, because the mean of its divisors is an integer number (600101491).

Almost surely, 2^1200202981 is an apocalyptic number.

It is an amenable number.

1200202981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200202981 is an equidigital number, since it uses as much as digits as its factorization.

1200202981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1200202981 is about 34643.9458058692. The cubic root of 1200202981 is about 1062.7184823321.

The spelling of 1200202981 in words is "one billion, two hundred million, two hundred two thousand, nine hundred eighty-one".