10021221196 has 24 divisors (see below), whose sum is σ = 20116414976. Its totient is φ = 4278957840.

The previous prime is 10021221191. The next prime is 10021221239. The reversal of 10021221196 is 69112212001.

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 10021221196.

It is not an unprimeable number, because it can be changed into a prime (10021221191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652746 + ... + 667921.

Almost surely, 2^10021221196 is an apocalyptic number.

It is an amenable number.

10021221196 is an abundant number, since it is smaller than the sum of its proper divisors (10095193780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10021221196 is a wasteful number, since it uses less digits than its factorization.

10021221196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320949 (or 1320947 counting only the distinct ones).

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

Adding to 10021221196 its reverse (69112212001), we get a palindrome (79133433197).

The spelling of 10021221196 in words is "ten billion, twenty-one million, two hundred twenty-one thousand, one hundred ninety-six".