21120210210020 has 24 divisors (see below), whose sum is σ = 45014418181824. Its totient is φ = 8321993276256.

The previous prime is 21120210210017. The next prime is 21120210210023. The reversal of 21120210210020 is 2001201202112.

It is an interprime number because it is at equal distance from previous prime (21120210210017) and next prime (21120210210023).

It is a junction number, because it is equal to n+sod(n) for n = 21120210209977 and 21120210210004.

It is not an unprimeable number, because it can be changed into a prime (21120210210023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7880674112 + ... + 7880676791.

It is an arithmetic number, because the mean of its divisors is an integer number (1875600757576).

Almost surely, 2^{21120210210020} is an apocalyptic number.

21120210210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120210210020 is an abundant number, since it is smaller than the sum of its proper divisors (23894207971804).

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

21120210210020 is a wasteful number, since it uses less digits than its factorization.

21120210210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15761350979 (or 15761350977 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21120210210020 its reverse (2001201202112), we get a palindrome (23121411412132).

The spelling of 21120210210020 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two hundred ten thousand, twenty".