21121333033320 has 192 divisors, whose sum is σ = 75177627033600. Its totient is φ = 5110977000960.

The previous prime is 21121333033309. The next prime is 21121333033357. The reversal of 21121333033320 is 2333033312112.

21121333033320 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 1 + 3 + 330 + 3 + 3 + 320 = 666.

It is a super-2 number, since 2×21121333033320² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37970536 + ... + 38522775.

It is an arithmetic number, because the mean of its divisors is an integer number (391550140800).

Almost surely, 2^{21121333033320} is an apocalyptic number.

21121333033320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121333033320 is an abundant number, since it is smaller than the sum of its proper divisors (54056294000280).

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

21121333033320 is a wasteful number, since it uses less digits than its factorization.

21121333033320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76493400 (or 76493393 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 21121333033320 its reverse (2333033312112), we get a palindrome (23454366345432).

The spelling of 21121333033320 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred thirty-three million, thirty-three thousand, three hundred twenty".