21022112212102 has 32 divisors (see below), whose sum is σ = 34257619325952. Its totient is φ = 9636365418624.

The previous prime is 21022112212081. The next prime is 21022112212133. The reversal of 21022112212102 is 20121221122012.

It is a self number, because there is not a number n which added to its sum of digits gives 21022112212102.

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 15 ways as a sum of consecutive naturals, for example, 19053378 + ... + 20126485.

It is an arithmetic number, because the mean of its divisors is an integer number (1070550603936).

Almost surely, 2^{21022112212102} is an apocalyptic number.

21022112212102 is a deficient number, since it is larger than the sum of its proper divisors (13235507113850).

21022112212102 is a wasteful number, since it uses less digits than its factorization.

21022112212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39180292.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21022112212102 its reverse (20121221122012), we get a palindrome (41143333334114).

The spelling of 21022112212102 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, two hundred twelve thousand, one hundred two".