21112222112102 has 64 divisors (see below), whose sum is σ = 35875018920960. Its totient is φ = 9230237721600.

The previous prime is 21112222112089. The next prime is 21112222112129. The reversal of 21112222112102 is 20121122221112.

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, 185003153 + ... + 185117235.

It is an arithmetic number, because the mean of its divisors is an integer number (560547170640).

Almost surely, 2^{21112222112102} is an apocalyptic number.

21112222112102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21112222112102 is a deficient number, since it is larger than the sum of its proper divisors (14762796808858).

21112222112102 is a wasteful number, since it uses less digits than its factorization.

21112222112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115229.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21112222112102 its reverse (20121122221112), we get a palindrome (41233344333214).

The spelling of 21112222112102 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twelve thousand, one hundred two".