21333112120 has 32 divisors (see below), whose sum is σ = 48078633600. Its totient is φ = 8519177088.

The previous prime is 21333112109. The next prime is 21333112159. The reversal of 21333112120 is 2121133312.

It is a super-3 number, since 3×21333112120³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415035 + ... + 463594.

It is an arithmetic number, because the mean of its divisors is an integer number (1502457300).

Almost surely, 2^21333112120 is an apocalyptic number.

21333112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21333112120 is an abundant number, since it is smaller than the sum of its proper divisors (26745521480).

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

21333112120 is a wasteful number, since it uses less digits than its factorization.

21333112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879247 (or 879243 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21333112120 its reverse (2121133312), we get a palindrome (23454245432).

The spelling of 21333112120 in words is "twenty-one billion, three hundred thirty-three million, one hundred twelve thousand, one hundred twenty".