20120231311 has 8 divisors (see below), whose sum is σ = 20597797584. Its totient is φ = 19648123200.

The previous prime is 20120231297. The next prime is 20120231321. The reversal of 20120231311 is 11313202102.

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 20120231311 - 2¹¹ = 20120229263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120231321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1357081 + ... + 1371826.

It is an arithmetic number, because the mean of its divisors is an integer number (2574724698).

Almost surely, 2^20120231311 is an apocalyptic number.

20120231311 is a deficient number, since it is larger than the sum of its proper divisors (477566273).

20120231311 is a wasteful number, since it uses less digits than its factorization.

20120231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729081.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20120231311 its reverse (11313202102), we get a palindrome (31433433413).

The spelling of 20120231311 in words is "twenty billion, one hundred twenty million, two hundred thirty-one thousand, three hundred eleven".