21122222212120 has 16 divisors (see below), whose sum is σ = 47524999977360. Its totient is φ = 8448888884832.

The previous prime is 21122222212057. The next prime is 21122222212121. The reversal of 21122222212120 is 2121222222112.

21122222212120 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21122222212120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122222212091 and 21122222212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122222212121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264027777612 + ... + 264027777691.

It is an arithmetic number, because the mean of its divisors is an integer number (2970312498585).

Almost surely, 2^{21122222212120} is an apocalyptic number.

21122222212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122222212120 is an abundant number, since it is smaller than the sum of its proper divisors (26402777765240).

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

21122222212120 is a wasteful number, since it uses less digits than its factorization.

21122222212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528055555314 (or 528055555310 counting only the distinct ones).

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

Adding to 21122222212120 its reverse (2121222222112), we get a palindrome (23243444434232).

The spelling of 21122222212120 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty".