21122012122222 has 32 divisors (see below), whose sum is σ = 36894841632000. Its totient is φ = 8967496204800.

The previous prime is 21122012122177. The next prime is 21122012122283. The reversal of 21122012122222 is 22222121022112.

It is a super-2 number, since 2×21122012122222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21122012122193 and 21122012122202.

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, 355823347 + ... + 355882702.

It is an arithmetic number, because the mean of its divisors is an integer number (1152963801000).

Almost surely, 2^{21122012122222} is an apocalyptic number.

21122012122222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122012122222 is a deficient number, since it is larger than the sum of its proper divisors (15772829509778).

21122012122222 is a wasteful number, since it uses less digits than its factorization.

21122012122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711706152.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21122012122222 its reverse (22222121022112), we get a palindrome (43344133144334).

The spelling of 21122012122222 in words is "twenty-one trillion, one hundred twenty-two billion, twelve million, one hundred twenty-two thousand, two hundred twenty-two".