21202222102 has 4 divisors (see below), whose sum is σ = 31803333156. Its totient is φ = 10601111050.

The previous prime is 21202222099. The next prime is 21202222109. The reversal of 21202222102 is 20122220212.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 5300555524 + ... + 5300555527.

It is an arithmetic number, because the mean of its divisors is an integer number (7950833289).

Almost surely, 2^21202222102 is an apocalyptic number.

21202222102 is a deficient number, since it is larger than the sum of its proper divisors (10601111054).

21202222102 is a wasteful number, since it uses less digits than its factorization.

21202222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601111053.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21202222102 its reverse (20122220212), we get a palindrome (41324442314).

It can be divided in two parts, 2120 and 2222102, that added together give a palindrome (2224222).

The spelling of 21202222102 in words is "twenty-one billion, two hundred two million, two hundred twenty-two thousand, one hundred two".