21202112000101 has 4 divisors (see below), whose sum is σ = 21218560497900. Its totient is φ = 21185663502304.

The previous prime is 21202112000071. The next prime is 21202112000107. The reversal of 21202112000101 is 10100021120212.

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 14219490723876 + 6982621276225 = 3770874^2 + 2642465^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202112000101 - 2³³ = 21193522065509 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 (21202112000107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8224246966 + ... + 8224249543.

It is an arithmetic number, because the mean of its divisors is an integer number (5304640124475).

Almost surely, 2^{21202112000101} is an apocalyptic number.

It is an amenable number.

21202112000101 is a deficient number, since it is larger than the sum of its proper divisors (16448497799).

21202112000101 is a wasteful number, since it uses less digits than its factorization.

21202112000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16448497798.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21202112000101 its reverse (10100021120212), we get a palindrome (31302133120313).

The spelling of 21202112000101 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, one hundred one", and thus it is an aban number.