21222121100102 has 8 divisors (see below), whose sum is σ = 34281887930976. Its totient is φ = 9794825123112.

The previous prime is 21222121100057. The next prime is 21222121100149. The reversal of 21222121100102 is 20100112122212.

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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408117713438 + ... + 408117713489.

It is an arithmetic number, because the mean of its divisors is an integer number (4285235991372).

Almost surely, 2^{21222121100102} is an apocalyptic number.

21222121100102 is a deficient number, since it is larger than the sum of its proper divisors (13059766830874).

21222121100102 is a wasteful number, since it uses less digits than its factorization.

21222121100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816235426942.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21222121100102 its reverse (20100112122212), we get a palindrome (41322233222314).

The spelling of 21222121100102 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred thousand, one hundred two".