21110120010020 has 96 divisors (see below), whose sum is σ = 45432436896000. Its totient is φ = 8236850840064.

The previous prime is 21110120009999. The next prime is 21110120010041. The reversal of 21110120010020 is 2001002101112.

It is an interprime number because it is at equal distance from previous prime (21110120009999) and next prime (21110120010041).

It is a junction number, because it is equal to n+sod(n) for n = 21110120009983 and 21110120010010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253080281 + ... + 253163679.

It is an arithmetic number, because the mean of its divisors is an integer number (473254551000).

Almost surely, 2^{21110120010020} is an apocalyptic number.

21110120010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110120010020 is an abundant number, since it is smaller than the sum of its proper divisors (24322316885980).

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

21110120010020 is a wasteful number, since it uses less digits than its factorization.

21110120010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85317 (or 85315 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21110120010020 its reverse (2001002101112), we get a palindrome (23111122111132).

The spelling of 21110120010020 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty million, ten thousand, twenty".