201998011 has 2 divisors, whose sum is σ = 201998012. Its totient is φ = 201998010.

The previous prime is 201997973. The next prime is 201998089. The reversal of 201998011 is 110899102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201998011 - 2¹³ = 201989819 is a prime.

It is a super-2 number, since 2×201998011² = 81606392895912242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201998411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100999005 + 100999006.

It is an arithmetic number, because the mean of its divisors is an integer number (100999006).

Almost surely, 2^201998011 is an apocalyptic number.

201998011 is a deficient number, since it is larger than the sum of its proper divisors (1).

201998011 is an equidigital number, since it uses as much as digits as its factorization.

201998011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 201998011 is about 14212.6004306038. The cubic root of 201998011 is about 586.7445050316.

The spelling of 201998011 in words is "two hundred one million, nine hundred ninety-eight thousand, eleven".