21122122112102 has 24 divisors (see below), whose sum is σ = 35170122195936. Its totient is φ = 9505905530000.

The previous prime is 21122122112087. The next prime is 21122122112131. The reversal of 21122122112102 is 20121122122112.

It is a super-2 number, since 2×21122122112102² (a number of 27 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 432062174 + ... + 432111057.

It is an arithmetic number, because the mean of its divisors is an integer number (1465421758164).

Almost surely, 2^{21122122112102} is an apocalyptic number.

21122122112102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122122112102 is a deficient number, since it is larger than the sum of its proper divisors (14048000083834).

21122122112102 is a wasteful number, since it uses less digits than its factorization.

21122122112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864173356 (or 864173345 counting only the distinct ones).

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

Adding to 21122122112102 its reverse (20121122122112), we get a palindrome (41243244234214).

The spelling of 21122122112102 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-two million, one hundred twelve thousand, one hundred two".