21113002402420 has 96 divisors (see below), whose sum is σ = 45159400371456. Its totient is φ = 8289684480000.

The previous prime is 21113002402369. The next prime is 21113002402483. The reversal of 21113002402420 is 2420420031112.

It is a junction number, because it is equal to n+sod(n) for n = 21113002402391 and 21113002402400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 981213502 + ... + 981235018.

It is an arithmetic number, because the mean of its divisors is an integer number (470410420536).

Almost surely, 2^{21113002402420} is an apocalyptic number.

21113002402420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113002402420 is an abundant number, since it is smaller than the sum of its proper divisors (24046397969036).

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

21113002402420 is a wasteful number, since it uses less digits than its factorization.

21113002402420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24601 (or 24599 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21113002402420 its reverse (2420420031112), we get a palindrome (23533422433532).

The spelling of 21113002402420 in words is "twenty-one trillion, one hundred thirteen billion, two million, four hundred two thousand, four hundred twenty".