21010221330120 has 320 divisors, whose sum is σ = 81569096928000. Its totient is φ = 4793775851520.

The previous prime is 21010221330089. The next prime is 21010221330149. The reversal of 21010221330120 is 2103312201012.

21010221330120 is a `hidden beast` number, since 2 + 101 + 0 + 221 + 330 + 12 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21010221330093 and 21010221330102.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 16732720 + ... + 17944479.

It is an arithmetic number, because the mean of its divisors is an integer number (254903427900).

Almost surely, 2^{21010221330120} is an apocalyptic number.

21010221330120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010221330120 is an abundant number, since it is smaller than the sum of its proper divisors (60558875597880).

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

21010221330120 is a wasteful number, since it uses less digits than its factorization.

21010221330120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34677250 (or 34677237 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21010221330120 its reverse (2103312201012), we get a palindrome (23113533531132).

The spelling of 21010221330120 in words is "twenty-one trillion, ten billion, two hundred twenty-one million, three hundred thirty thousand, one hundred twenty".