21202022102101 has 4 divisors (see below), whose sum is σ = 21218862470400. Its totient is φ = 21185181733804.

The previous prime is 21202022102099. The next prime is 21202022102117. The reversal of 21202022102101 is 10120122020212.

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 21202022102101 - 2¹ = 21202022102099 is a prime.

It is a super-2 number, since 2×21202022102101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202022102501) 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, 8420182261 + ... + 8420184778.

It is an arithmetic number, because the mean of its divisors is an integer number (5304715617600).

Almost surely, 2^{21202022102101} is an apocalyptic number.

It is an amenable number.

21202022102101 is a deficient number, since it is larger than the sum of its proper divisors (16840368299).

21202022102101 is a wasteful number, since it uses less digits than its factorization.

21202022102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16840368298.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202022102101 its reverse (10120122020212), we get a palindrome (31322144122313).

The spelling of 21202022102101 in words is "twenty-one trillion, two hundred two billion, twenty-two million, one hundred two thousand, one hundred one".