12540143212 has 12 divisors (see below), whose sum is σ = 21952989576. Its totient is φ = 6267860480.

The previous prime is 12540143201. The next prime is 12540143227. The reversal of 12540143212 is 21234104521.

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, 539989 + ... + 562732.

It is an arithmetic number, because the mean of its divisors is an integer number (1829415798).

Almost surely, 2^12540143212 is an apocalyptic number.

It is an amenable number.

12540143212 is a deficient number, since it is larger than the sum of its proper divisors (9412846364).

12540143212 is a wasteful number, since it uses less digits than its factorization.

12540143212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105568 (or 1105566 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 12540143212 its reverse (21234104521), we get a palindrome (33774247733).

The spelling of 12540143212 in words is "twelve billion, five hundred forty million, one hundred forty-three thousand, two hundred twelve".