21150036200101 has 4 divisors (see below), whose sum is σ = 21150095625100. Its totient is φ = 21149976775104.

The previous prime is 21150036200087. The next prime is 21150036200191. The reversal of 21150036200101 is 10100263005112.

It is a happy number.

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 10184070180001 + 10965966020100 = 3191249^2 + 3311490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21150036200101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150036200191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29175396 + ... + 29891533.

It is an arithmetic number, because the mean of its divisors is an integer number (5287523906275).

Almost surely, 2^{21150036200101} is an apocalyptic number.

It is an amenable number.

21150036200101 is a deficient number, since it is larger than the sum of its proper divisors (59424999).

21150036200101 is an equidigital number, since it uses as much as digits as its factorization.

21150036200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59424998.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 21150036200101 its reverse (10100263005112), we get a palindrome (31250299205213).

The spelling of 21150036200101 in words is "twenty-one trillion, one hundred fifty billion, thirty-six million, two hundred thousand, one hundred one".