1231303011212 has 12 divisors (see below), whose sum is σ = 2154998898360. Its totient is φ = 615589040256.

The previous prime is 1231303011193. The next prime is 1231303011233. The reversal of 1231303011212 is 2121103031321.

It is a happy number.

It is a super-2 number, since 2×1231303011212² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15571973 + ... + 15650844.

It is an arithmetic number, because the mean of its divisors is an integer number (179583241530).

Almost surely, 2^{1231303011212} is an apocalyptic number.

It is an amenable number.

1231303011212 is a deficient number, since it is larger than the sum of its proper divisors (923695887148).

1231303011212 is a wasteful number, since it uses less digits than its factorization.

1231303011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31232680 (or 31232678 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1231303011212 its reverse (2121103031321), we get a palindrome (3352406042533).

The spelling of 1231303011212 in words is "one trillion, two hundred thirty-one billion, three hundred three million, eleven thousand, two hundred twelve".