201102000100021 has 4 divisors (see below), whose sum is σ = 201102442447212. Its totient is φ = 201101557752832.

The previous prime is 201102000100007. The next prime is 201102000100063. The reversal of 201102000100021 is 120001000201102.

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 28545244700625 + 172556755399396 = 5342775^2 + 13136086^2 .

It is a cyclic number.

It is not a de Polignac number, because 201102000100021 - 2¹⁷ = 201101999968949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201102000099980 and 201102000100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201102000110021) 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, 220490956 + ... + 221401141.

It is an arithmetic number, because the mean of its divisors is an integer number (50275610611803).

Almost surely, 2^{201102000100021} is an apocalyptic number.

It is an amenable number.

201102000100021 is a deficient number, since it is larger than the sum of its proper divisors (442347191).

201102000100021 is an equidigital number, since it uses as much as digits as its factorization.

201102000100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442347190.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201102000100021 its reverse (120001000201102), we get a palindrome (321103000301123).

The spelling of 201102000100021 in words is "two hundred one trillion, one hundred two billion, one hundred thousand, twenty-one".