21010113232220 has 96 divisors (see below), whose sum is σ = 55231454033280. Its totient is φ = 6545950064640.

The previous prime is 21010113232217. The next prime is 21010113232243. The reversal of 21010113232220 is 2223231101012.

It is a super-2 number, since 2×21010113232220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21010113232192 and 21010113232201.

It is a congruent number.

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, 152134061 + ... + 152272100.

It is an arithmetic number, because the mean of its divisors is an integer number (575327646180).

Almost surely, 2^{21010113232220} is an apocalyptic number.

21010113232220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010113232220 is an abundant number, since it is smaller than the sum of its proper divisors (34221340801060).

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

21010113232220 is a wasteful number, since it uses less digits than its factorization.

21010113232220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304406223 (or 304406221 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21010113232220 its reverse (2223231101012), we get a palindrome (23233344333232).

The spelling of 21010113232220 in words is "twenty-one trillion, ten billion, one hundred thirteen million, two hundred thirty-two thousand, two hundred twenty".