12131040212 has 6 divisors (see below), whose sum is σ = 21229320378. Its totient is φ = 6065520104.

The previous prime is 12131040197. The next prime is 12131040227. The reversal of 12131040212 is 21204013121.

It is an interprime number because it is at equal distance from previous prime (12131040197) and next prime (12131040227).

It can be written as a sum of positive squares in only one way, i.e., 11757932356 + 373107856 = 108434^2 + 19316^2 .

It is a super-2 number, since 2×12131040212² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1516380023 + ... + 1516380030.

It is an arithmetic number, because the mean of its divisors is an integer number (3538220063).

Almost surely, 2^12131040212 is an apocalyptic number.

It is an amenable number.

12131040212 is a deficient number, since it is larger than the sum of its proper divisors (9098280166).

12131040212 is a wasteful number, since it uses less digits than its factorization.

12131040212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032760057 (or 3032760055 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12131040212 its reverse (21204013121), we get a palindrome (33335053333).

The spelling of 12131040212 in words is "twelve billion, one hundred thirty-one million, forty thousand, two hundred twelve".