21010021102201 has 4 divisors (see below), whose sum is σ = 21022214964112. Its totient is φ = 20997827240292.

The previous prime is 21010021102183. The next prime is 21010021102219. The reversal of 21010021102201 is 10220112001012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21010021102183) and next prime (21010021102219).

It is a cyclic number.

It is not a de Polignac number, because 21010021102201 - 2²⁷ = 21009886884473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010021102241) 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, 6096928371 + ... + 6096931816.

It is an arithmetic number, because the mean of its divisors is an integer number (5255553741028).

Almost surely, 2^{21010021102201} is an apocalyptic number.

It is an amenable number.

21010021102201 is a deficient number, since it is larger than the sum of its proper divisors (12193861911).

21010021102201 is a wasteful number, since it uses less digits than its factorization.

21010021102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12193861910.

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

Adding to 21010021102201 its reverse (10220112001012), we get a palindrome (31230133103213).

The spelling of 21010021102201 in words is "twenty-one trillion, ten billion, twenty-one million, one hundred two thousand, two hundred one".