20102121196 has 6 divisors (see below), whose sum is σ = 35178712100. Its totient is φ = 10051060596.

The previous prime is 20102121181. The next prime is 20102121227. The reversal of 20102121196 is 69112120102.

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 20102121196.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2512765146 + ... + 2512765153.

Almost surely, 2^20102121196 is an apocalyptic number.

It is an amenable number.

20102121196 is a deficient number, since it is larger than the sum of its proper divisors (15076590904).

20102121196 is a wasteful number, since it uses less digits than its factorization.

20102121196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025530303 (or 5025530301 counting only the distinct ones).

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

Adding to 20102121196 its reverse (69112120102), we get a palindrome (89214241298).

The spelling of 20102121196 in words is "twenty billion, one hundred two million, one hundred twenty-one thousand, one hundred ninety-six".