21120133331 has 8 divisors (see below), whose sum is σ = 23268266928. Its totient is φ = 19010020000.

The previous prime is 21120133303. The next prime is 21120133337. The reversal of 21120133331 is 13333102112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21120133331 - 2⁶ = 21120133267 is a prime.

It is a super-2 number, since 2×21120133331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120133337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9503900 + ... + 9506121.

It is an arithmetic number, because the mean of its divisors is an integer number (2908533366).

Almost surely, 2^21120133331 is an apocalyptic number.

21120133331 is a deficient number, since it is larger than the sum of its proper divisors (2148133597).

21120133331 is a wasteful number, since it uses less digits than its factorization.

21120133331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19010133.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21120133331 its reverse (13333102112), we get a palindrome (34453235443).

It can be divided in two parts, 21120 and 133331, that added together give a palindrome (154451).

The spelling of 21120133331 in words is "twenty-one billion, one hundred twenty million, one hundred thirty-three thousand, three hundred thirty-one".