12145203212 has 12 divisors (see below), whose sum is σ = 21602534016. Its totient is φ = 5973050640.

The previous prime is 12145203179. The next prime is 12145203221. The reversal of 12145203212 is 21230254121.

It is a super-2 number, since 2×12145203212² (a number of 21 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, 24887468 + ... + 24887955.

It is an arithmetic number, because the mean of its divisors is an integer number (1800211168).

Almost surely, 2^12145203212 is an apocalyptic number.

It is an amenable number.

12145203212 is a deficient number, since it is larger than the sum of its proper divisors (9457330804).

12145203212 is a wasteful number, since it uses less digits than its factorization.

12145203212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49775488 (or 49775486 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12145203212 its reverse (21230254121), we get a palindrome (33375457333).

The spelling of 12145203212 in words is "twelve billion, one hundred forty-five million, two hundred three thousand, two hundred twelve".