21111010202120 has 64 divisors (see below), whose sum is σ = 47987720352000. Its totient is φ = 8357826509568.

The previous prime is 21111010202089. The next prime is 21111010202201. The reversal of 21111010202120 is 2120201011112.

21111010202120 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21111010202095 and 21111010202104.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1372469 + ... + 6641211.

It is an arithmetic number, because the mean of its divisors is an integer number (749808130500).

Almost surely, 2^{21111010202120} is an apocalyptic number.

21111010202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111010202120 is an abundant number, since it is smaller than the sum of its proper divisors (26876710149880).

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

21111010202120 is a wasteful number, since it uses less digits than its factorization.

21111010202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269782 (or 5269778 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21111010202120 its reverse (2120201011112), we get a palindrome (23231211213232).

The spelling of 21111010202120 in words is "twenty-one trillion, one hundred eleven billion, ten million, two hundred two thousand, one hundred twenty".