21211110200120 has 32 divisors (see below), whose sum is σ = 47877474010320. Its totient is φ = 8457337224960.

The previous prime is 21211110200047. The next prime is 21211110200131. The reversal of 21211110200120 is 2100201111212.

It is a super-2 number, since 2×21211110200120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21211110200095 and 21211110200104.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 847076546 + ... + 847101585.

Almost surely, 2^{21211110200120} is an apocalyptic number.

21211110200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211110200120 is an abundant number, since it is smaller than the sum of its proper divisors (26666363810200).

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

21211110200120 is a wasteful number, since it uses less digits than its factorization.

21211110200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694178455 (or 1694178451 counting only the distinct ones).

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

Adding to 21211110200120 its reverse (2100201111212), we get a palindrome (23311311311332).

The spelling of 21211110200120 in words is "twenty-one trillion, two hundred eleven billion, one hundred ten million, two hundred thousand, one hundred twenty".