21220122220102 has 64 divisors (see below), whose sum is σ = 34598692283904. Its totient is φ = 9702961056000.

The previous prime is 21220122220057. The next prime is 21220122220123. The reversal of 21220122220102 is 20102222102212.

It is a self number, because there is not a number n which added to its sum of digits gives 21220122220102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1767306583 + ... + 1767318589.

It is an arithmetic number, because the mean of its divisors is an integer number (540604566936).

Almost surely, 2^{21220122220102} is an apocalyptic number.

21220122220102 is a deficient number, since it is larger than the sum of its proper divisors (13378570063802).

21220122220102 is a wasteful number, since it uses less digits than its factorization.

21220122220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13693.

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

Adding to 21220122220102 its reverse (20102222102212), we get a palindrome (41322344322314).

The spelling of 21220122220102 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred twenty thousand, one hundred two".