21010020221120 has 168 divisors, whose sum is σ = 59066926159536. Its totient is φ = 7095921186816.

The previous prime is 21010020221111. The next prime is 21010020221171. The reversal of 21010020221120 is 2112202001012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21010020221095 and 21010020221104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8948879 + ... + 11049998.

Almost surely, 2^{21010020221120} is an apocalyptic number.

21010020221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010020221120 is an abundant number, since it is smaller than the sum of its proper divisors (38056905938416).

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

21010020221120 is a wasteful number, since it uses less digits than its factorization.

21010020221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19998975 (or 19998958 counting only the distinct ones).

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

Adding to 21010020221120 its reverse (2112202001012), we get a palindrome (23122222222132).

The spelling of 21010020221120 in words is "twenty-one trillion, ten billion, twenty million, two hundred twenty-one thousand, one hundred twenty".