1001009201 has 2 divisors, whose sum is σ = 1001009202. Its totient is φ = 1001009200.

The previous prime is 1001009173. The next prime is 1001009213. The reversal of 1001009201 is 1029001001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949872400 + 51136801 = 30820^2 + 7151^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001009201 - 2¹⁸ = 1000747057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001009221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500504600 + 500504601.

It is an arithmetic number, because the mean of its divisors is an integer number (500504601).

Almost surely, 2^1001009201 is an apocalyptic number.

It is an amenable number.

1001009201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001009201 is an equidigital number, since it uses as much as digits as its factorization.

1001009201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1001009201 is about 31638.7294466766. The cubic root of 1001009201 is about 1000.3362872316.

The spelling of 1001009201 in words is "one billion, one million, nine thousand, two hundred one".