12131123012 has 6 divisors (see below), whose sum is σ = 21229465278. Its totient is φ = 6065561504.

The previous prime is 12131122987. The next prime is 12131123033. The reversal of 12131123012 is 21032113121.

It can be written as a sum of positive squares in only one way, i.e., 12074932996 + 56190016 = 109886^2 + 7496^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1516390373 + ... + 1516390380.

It is an arithmetic number, because the mean of its divisors is an integer number (3538244213).

Almost surely, 2^12131123012 is an apocalyptic number.

It is an amenable number.

12131123012 is a deficient number, since it is larger than the sum of its proper divisors (9098342266).

12131123012 is a wasteful number, since it uses less digits than its factorization.

12131123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032780757 (or 3032780755 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12131123012 its reverse (21032113121), we get a palindrome (33163236133).

The spelling of 12131123012 in words is "twelve billion, one hundred thirty-one million, one hundred twenty-three thousand, twelve".