21201110210120 has 32 divisors (see below), whose sum is σ = 49776519625920. Its totient is φ = 8111729123520.

The previous prime is 21201110210117. The next prime is 21201110210141. The reversal of 21201110210120 is 2101201110212.

It is a junction number, because it is equal to n+sod(n) for n = 21201110210095 and 21201110210104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11522341586 + ... + 11522343425.

It is an arithmetic number, because the mean of its divisors is an integer number (1555516238310).

Almost surely, 2^{21201110210120} is an apocalyptic number.

21201110210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201110210120 is an abundant number, since it is smaller than the sum of its proper divisors (28575409415800).

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

21201110210120 is a wasteful number, since it uses less digits than its factorization.

21201110210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23044685045 (or 23044685041 counting only the distinct ones).

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

Adding to 21201110210120 its reverse (2101201110212), we get a palindrome (23302311320332).

The spelling of 21201110210120 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, two hundred ten thousand, one hundred twenty".