21002222102 has 8 divisors (see below), whose sum is σ = 31507734456. Its totient is φ = 10499643952.

The previous prime is 21002222099. The next prime is 21002222123. The reversal of 21002222102 is 20122220012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715568 + ... + 744339.

It is an arithmetic number, because the mean of its divisors is an integer number (3938466807).

Almost surely, 2^21002222102 is an apocalyptic number.

21002222102 is a deficient number, since it is larger than the sum of its proper divisors (10505512354).

21002222102 is a wasteful number, since it uses less digits than its factorization.

21002222102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467102.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21002222102 its reverse (20122220012), we get a palindrome (41124442114).

The spelling of 21002222102 in words is "twenty-one billion, two million, two hundred twenty-two thousand, one hundred two".