1231103031212 has 12 divisors (see below), whose sum is σ = 2163444659040. Its totient is φ = 612975985776.

The previous prime is 1231103031161. The next prime is 1231103031229. The reversal of 1231103031212 is 2121303011321.

It is a happy number.

It is a super-2 number, since 2×1231103031212² (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, 643881383 + ... + 643883294.

It is an arithmetic number, because the mean of its divisors is an integer number (180287054920).

Almost surely, 2^{1231103031212} is an apocalyptic number.

It is an amenable number.

1231103031212 is a deficient number, since it is larger than the sum of its proper divisors (932341627828).

1231103031212 is a wasteful number, since it uses less digits than its factorization.

1231103031212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287764920 (or 1287764918 counting only the distinct ones).

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

Adding to 1231103031212 its reverse (2121303011321), we get a palindrome (3352406042533).

The spelling of 1231103031212 in words is "one trillion, two hundred thirty-one billion, one hundred three million, thirty-one thousand, two hundred twelve".