21022220102 has 8 divisors (see below), whose sum is σ = 33958970976. Its totient is φ = 9702563112.

The previous prime is 21022220083. The next prime is 21022220159. The reversal of 21022220102 is 20102222012.

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 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, 404273438 + ... + 404273489.

It is an arithmetic number, because the mean of its divisors is an integer number (4244871372).

Almost surely, 2^21022220102 is an apocalyptic number.

21022220102 is a deficient number, since it is larger than the sum of its proper divisors (12936750874).

21022220102 is a wasteful number, since it uses less digits than its factorization.

21022220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808546942.

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

Adding to 21022220102 its reverse (20102222012), we get a palindrome (41124442114).

It can be divided in two parts, 2102222010 and 2, that added together give a palindrome (2102222012).

The spelling of 21022220102 in words is "twenty-one billion, twenty-two million, two hundred twenty thousand, one hundred two".