201201011 has 4 divisors (see below), whose sum is σ = 219492024. Its totient is φ = 182910000.

The previous prime is 201200957. The next prime is 201201023. The reversal of 201201011 is 110102102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201201011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201201011.

It is not an unprimeable number, because it can be changed into a prime (201201041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9145490 + ... + 9145511.

It is an arithmetic number, because the mean of its divisors is an integer number (54873006).

Almost surely, 2^201201011 is an apocalyptic number.

201201011 is a deficient number, since it is larger than the sum of its proper divisors (18291013).

201201011 is a wasteful number, since it uses less digits than its factorization.

201201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18291012.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 201201011 is about 14184.5342186481. The cubic root of 201201011 is about 585.9718047604.

Adding to 201201011 its reverse (110102102), we get a palindrome (311303113).

The spelling of 201201011 in words is "two hundred one million, two hundred one thousand, eleven".