201101010011021 has 4 divisors (see below), whose sum is σ = 201101803934844. Its totient is φ = 201100216087200.

The previous prime is 201101010011017. The next prime is 201101010011063. The reversal of 201101010011021 is 120110010101102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 89155405221796 + 111945604789225 = 9442214^2 + 10580435^2 .

It is a cyclic number.

It is not a de Polignac number, because 201101010011021 - 2² = 201101010011017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201101010010993 and 201101010011011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101010011071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396581840 + ... + 397088601.

It is an arithmetic number, because the mean of its divisors is an integer number (50275450983711).

Almost surely, 2^{201101010011021} is an apocalyptic number.

It is an amenable number.

201101010011021 is a deficient number, since it is larger than the sum of its proper divisors (793923823).

201101010011021 is an equidigital number, since it uses as much as digits as its factorization.

201101010011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793923822.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 201101010011021 its reverse (120110010101102), we get a palindrome (321211020112123).

The spelling of 201101010011021 in words is "two hundred one trillion, one hundred one billion, ten million, eleven thousand, twenty-one".