201990011 has 2 divisors, whose sum is σ = 201990012. Its totient is φ = 201990010.

The previous prime is 201989929. The next prime is 201990029. The reversal of 201990011 is 110099102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201990011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201990031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100995005 + 100995006.

It is an arithmetic number, because the mean of its divisors is an integer number (100995006).

Almost surely, 2^201990011 is an apocalyptic number.

201990011 is a deficient number, since it is larger than the sum of its proper divisors (1).

201990011 is an equidigital number, since it uses as much as digits as its factorization.

201990011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 201990011 is about 14212.3189874137. The cubic root of 201990011 is about 586.7367590510.

The spelling of 201990011 in words is "two hundred one million, nine hundred ninety thousand, eleven".