20121201196 has 12 divisors (see below), whose sum is σ = 36426312720. Its totient is φ = 9713683280.

The previous prime is 20121201187. The next prime is 20121201197. The reversal of 20121201196 is 69110212102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20121201196.

It is not an unprimeable number, because it can be changed into a prime (20121201197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86729200 + ... + 86729431.

It is an arithmetic number, because the mean of its divisors is an integer number (3035526060).

Almost surely, 2^20121201196 is an apocalyptic number.

It is an amenable number.

20121201196 is a deficient number, since it is larger than the sum of its proper divisors (16305111524).

20121201196 is a wasteful number, since it uses less digits than its factorization.

20121201196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173458664 (or 173458662 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 20121201196 its reverse (69110212102), we get a palindrome (89231413298).

The spelling of 20121201196 in words is "twenty billion, one hundred twenty-one million, two hundred one thousand, one hundred ninety-six".