201021011 has 8 divisors (see below), whose sum is σ = 209796480. Its totient is φ = 192368512.

The previous prime is 201020987. The next prime is 201021043. The reversal of 201021011 is 110120102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201021011 - 2¹⁴ = 201004627 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 201021011.

It is not an unprimeable number, because it can be changed into a prime (201021071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27395 + ... + 33948.

It is an arithmetic number, because the mean of its divisors is an integer number (26224560).

Almost surely, 2^201021011 is an apocalyptic number.

201021011 is a deficient number, since it is larger than the sum of its proper divisors (8775469).

201021011 is a wasteful number, since it uses less digits than its factorization.

201021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61485.

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

The square root of 201021011 is about 14178.1878602309. The cubic root of 201021011 is about 585.7970104198.

Adding to 201021011 its reverse (110120102), we get a palindrome (311141113).

Subtracting from 201021011 its reverse (110120102), we obtain a palindrome (90900909).

The spelling of 201021011 in words is "two hundred one million, twenty-one thousand, eleven".