20121330331 has 8 divisors (see below), whose sum is σ = 20147400000. Its totient is φ = 20095280520.

The previous prime is 20121330149. The next prime is 20121330337. The reversal of 20121330331 is 13303312102.

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 20121330331 - 2⁹ = 20121329819 is a prime.

It is a super-2 number, since 2×20121330331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121330299 and 20121330308.

It is not an unprimeable number, because it can be changed into a prime (20121330337) 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, 3191220 + ... + 3197518.

It is an arithmetic number, because the mean of its divisors is an integer number (2518425000).

Almost surely, 2^20121330331 is an apocalyptic number.

20121330331 is a deficient number, since it is larger than the sum of its proper divisors (26069669).

20121330331 is a wasteful number, since it uses less digits than its factorization.

20121330331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9929.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20121330331 its reverse (13303312102), we get a palindrome (33424642433).

The spelling of 20121330331 in words is "twenty billion, one hundred twenty-one million, three hundred thirty thousand, three hundred thirty-one".