21122210202120 has 64 divisors (see below), whose sum is σ = 70407367344000. Its totient is φ = 5632589386944.

The previous prime is 21122210202109. The next prime is 21122210202133. The reversal of 21122210202120 is 2120201222112.

It is a happy number.

21122210202120 is a `hidden beast` number, since 211 + 2 + 221 + 0 + 20 + 212 + 0 = 666.

21122210202120 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 2×21122210202120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21122210202093 and 21122210202102.

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 15 ways as a sum of consecutive naturals, for example, 9778799940 + ... + 9778802099.

It is an arithmetic number, because the mean of its divisors is an integer number (1100115114750).

Almost surely, 2^{21122210202120} is an apocalyptic number.

21122210202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122210202120 is an abundant number, since it is smaller than the sum of its proper divisors (49285157141880).

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

21122210202120 is a wasteful number, since it uses less digits than its factorization.

21122210202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19557602059 (or 19557602049 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21122210202120 its reverse (2120201222112), we get a palindrome (23242411424232).

The spelling of 21122210202120 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred ten million, two hundred two thousand, one hundred twenty".