201101011 has 4 divisors (see below), whose sum is σ = 203053552. Its totient is φ = 199148472.

The previous prime is 201101009. The next prime is 201101059. The reversal of 201101011 is 110101102.

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

It is a cyclic number.

It is not a de Polignac number, because 201101011 - 2¹ = 201101009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201100985 and 201101003.

It is not an unprimeable number, because it can be changed into a prime (201101081) 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, 976116 + ... + 976321.

It is an arithmetic number, because the mean of its divisors is an integer number (50763388).

Almost surely, 2^201101011 is an apocalyptic number.

201101011 is a deficient number, since it is larger than the sum of its proper divisors (1952541).

201101011 is a wasteful number, since it uses less digits than its factorization.

201101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952540.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 201101011 is about 14181.0088146084. The cubic root of 201101011 is about 585.8747096700.

Adding to 201101011 its reverse (110101102), we get a palindrome (311202113).

Subtracting from 201101011 its reverse (110101102), we obtain a palindrome (90999909).

The spelling of 201101011 in words is "two hundred one million, one hundred one thousand, eleven".