21202000220101 has 4 divisors (see below), whose sum is σ = 21885935711104. Its totient is φ = 20518064729100.

The previous prime is 21202000220033. The next prime is 21202000220111. The reversal of 21202000220101 is 10102200020212.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 21202000220101 - 2²⁹ = 21201463349189 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 (21202000220111) 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, 341967745455 + ... + 341967745516.

It is an arithmetic number, because the mean of its divisors is an integer number (5471483927776).

Almost surely, 2^{21202000220101} is an apocalyptic number.

It is an amenable number.

21202000220101 is a deficient number, since it is larger than the sum of its proper divisors (683935491003).

21202000220101 is an equidigital number, since it uses as much as digits as its factorization.

21202000220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683935491002.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21202000220101 its reverse (10102200020212), we get a palindrome (31304200240313).

The spelling of 21202000220101 in words is "twenty-one trillion, two hundred two billion, two hundred twenty thousand, one hundred one".