21222210022102 has 4 divisors (see below), whose sum is σ = 31833315033156. Its totient is φ = 10611105011050.

The previous prime is 21222210022073. The next prime is 21222210022121. The reversal of 21222210022102 is 20122001222212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21222210022102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305552505524 + ... + 5305552505527.

It is an arithmetic number, because the mean of its divisors is an integer number (7958328758289).

Almost surely, 2^{21222210022102} is an apocalyptic number.

21222210022102 is a deficient number, since it is larger than the sum of its proper divisors (10611105011054).

21222210022102 is a wasteful number, since it uses less digits than its factorization.

21222210022102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611105011053.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222210022102 its reverse (20122001222212), we get a palindrome (41344211244314).

The spelling of 21222210022102 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred ten million, twenty-two thousand, one hundred two".