21012102222122 has 64 divisors (see below), whose sum is σ = 37188390919680. Its totient is φ = 8796030796800.

The previous prime is 21012102222103. The next prime is 21012102222151. The reversal of 21012102222122 is 22122220121012.

It is a junction number, because it is equal to n+sod(n) for n = 21012102222094 and 21012102222103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85323704 + ... + 85569612.

It is an arithmetic number, because the mean of its divisors is an integer number (581068608120).

Almost surely, 2^{21012102222122} is an apocalyptic number.

21012102222122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012102222122 is a deficient number, since it is larger than the sum of its proper divisors (16176288697558).

21012102222122 is a wasteful number, since it uses less digits than its factorization.

21012102222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250847.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21012102222122 its reverse (22122220121012), we get a palindrome (43134322343134).

The spelling of 21012102222122 in words is "twenty-one trillion, twelve billion, one hundred two million, two hundred twenty-two thousand, one hundred twenty-two".