21202222101 has 4 divisors (see below), whose sum is σ = 28269629472. Its totient is φ = 14134814732.

The previous prime is 21202222099. The next prime is 21202222109. The reversal of 21202222101 is 10122220212.

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 21202222101 - 2¹ = 21202222099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202222109) 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, 3533703681 + ... + 3533703686.

It is an arithmetic number, because the mean of its divisors is an integer number (7067407368).

Almost surely, 2^21202222101 is an apocalyptic number.

It is an amenable number.

21202222101 is a deficient number, since it is larger than the sum of its proper divisors (7067407371).

21202222101 is an equidigital number, since it uses as much as digits as its factorization.

21202222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7067407370.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21202222101 its reverse (10122220212), we get a palindrome (31324442313).

The spelling of 21202222101 in words is "twenty-one billion, two hundred two million, two hundred twenty-two thousand, one hundred one".