12101231311 has 12 divisors (see below), whose sum is σ = 13108169952. Its totient is φ = 11166557376.

The previous prime is 12101231291. The next prime is 12101231323. The reversal of 12101231311 is 11313210121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12101231311 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 (12101231371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 565275 + ... + 586291.

It is an arithmetic number, because the mean of its divisors is an integer number (1092347496).

Almost surely, 2^12101231311 is an apocalyptic number.

12101231311 is a deficient number, since it is larger than the sum of its proper divisors (1006938641).

12101231311 is a wasteful number, since it uses less digits than its factorization.

12101231311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24450 (or 24437 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12101231311 its reverse (11313210121), we get a palindrome (23414441432).

The spelling of 12101231311 in words is "twelve billion, one hundred one million, two hundred thirty-one thousand, three hundred eleven".