20122212100 has 18 divisors (see below), whose sum is σ = 43665200474. Its totient is φ = 8048884800.

The previous prime is 20122212079. The next prime is 20122212151. The reversal of 20122212100 is 121222102.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1347183616 + 18775028484 = 36704^2 + 137022^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100610961 + ... + 100611160.

Almost surely, 2^20122212100 is an apocalyptic number.

20122212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122212100 is an abundant number, since it is smaller than the sum of its proper divisors (23542988374).

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

20122212100 is a wasteful number, since it uses less digits than its factorization.

20122212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201222135 (or 201222128 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20122212100 its reverse (121222102), we get a palindrome (20243434202).

The spelling of 20122212100 in words is "twenty billion, one hundred twenty-two million, two hundred twelve thousand, one hundred".