21120122110000 has 200 divisors, whose sum is σ = 52952877142704. Its totient is φ = 8152759680000.

The previous prime is 21120122109959. The next prime is 21120122110007. The reversal of 21120122110000 is 1122102112.

It is a tau number, because it is divible by the number of its divisors (200).

It is not an unprimeable number, because it can be changed into a prime (21120122110007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32003367 + ... + 32656633.

Almost surely, 2^{21120122110000} is an apocalyptic number.

21120122110000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21120122110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26476438571352).

21120122110000 is an abundant number, since it is smaller than the sum of its proper divisors (31832755032704).

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

21120122110000 is an equidigital number, since it uses as much as digits as its factorization.

21120122110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653409 (or 653388 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21120122110000 its reverse (1122102112), we get a palindrome (21121244212112).

The spelling of 21120122110000 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-two million, one hundred ten thousand".