21122121011222 has 192 divisors, whose sum is σ = 42620553271296. Its totient is φ = 7622508913920.

The previous prime is 21122121011221. The next prime is 21122121011261. The reversal of 21122121011222 is 22211012122112.

It is a super-2 number, since 2×21122121011222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122121011194 and 21122121011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122121011221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2918625788 + ... + 2918633024.

It is an arithmetic number, because the mean of its divisors is an integer number (221982048288).

Almost surely, 2^{21122121011222} is an apocalyptic number.

21122121011222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122121011222 is an abundant number, since it is smaller than the sum of its proper divisors (21498432260074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122121011222 is a wasteful number, since it uses less digits than its factorization.

21122121011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8459 (or 8440 counting only the distinct ones).

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

Adding to 21122121011222 its reverse (22211012122112), we get a palindrome (43333133133334).

The spelling of 21122121011222 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one million, eleven thousand, two hundred twenty-two".