1201324981 has 2 divisors, whose sum is σ = 1201324982. Its totient is φ = 1201324980.

The previous prime is 1201324973. The next prime is 1201324997. The reversal of 1201324981 is 1894231021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 827482756 + 373842225 = 28766^2 + 19335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201324981 - 2³ = 1201324973 is a prime.

It is a super-2 number, since 2×1201324981² = 2886363419949300722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201324961) 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, 600662490 + 600662491.

It is an arithmetic number, because the mean of its divisors is an integer number (600662491).

Almost surely, 2^1201324981 is an apocalyptic number.

It is an amenable number.

1201324981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201324981 is an equidigital number, since it uses as much as digits as its factorization.

1201324981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1201324981 is about 34660.1353286452. The cubic root of 1201324981 is about 1063.0495371036.

The spelling of 1201324981 in words is "one billion, two hundred one million, three hundred twenty-four thousand, nine hundred eighty-one".