12120310311 has 16 divisors (see below), whose sum is σ = 17038492800. Its totient is φ = 7642543968.

The previous prime is 12120310309. The next prime is 12120310357. The reversal of 12120310311 is 11301302121.

It is a happy number.

It is not a de Polignac number, because 12120310311 - 2¹ = 12120310309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120310381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136476 + ... + 207041.

It is an arithmetic number, because the mean of its divisors is an integer number (1064905800).

Almost surely, 2^12120310311 is an apocalyptic number.

12120310311 is a deficient number, since it is larger than the sum of its proper divisors (4918182489).

12120310311 is a wasteful number, since it uses less digits than its factorization.

12120310311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344158.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 12120310311 its reverse (11301302121), we get a palindrome (23421612432).

The spelling of 12120310311 in words is "twelve billion, one hundred twenty million, three hundred ten thousand, three hundred eleven".