20120331331 has 2 divisors, whose sum is σ = 20120331332. Its totient is φ = 20120331330.

The previous prime is 20120331247. The next prime is 20120331403. The reversal of 20120331331 is 13313302102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120331331 is a prime.

It is a super-2 number, since 2×20120331331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20120331299 and 20120331308.

It is not a weakly prime, because it can be changed into another prime (20120338331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060165665 + 10060165666.

It is an arithmetic number, because the mean of its divisors is an integer number (10060165666).

Almost surely, 2^20120331331 is an apocalyptic number.

20120331331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120331331 is an equidigital number, since it uses as much as digits as its factorization.

20120331331 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20120331331 its reverse (13313302102), we get a palindrome (33433633433).

The spelling of 20120331331 in words is "twenty billion, one hundred twenty million, three hundred thirty-one thousand, three hundred thirty-one".