20001122212 has 6 divisors (see below), whose sum is σ = 35001963878. Its totient is φ = 10000561104.

The previous prime is 20001122171. The next prime is 20001122249. The reversal of 20001122212 is 21222110002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19930662976 + 70459236 = 141176^2 + 8394^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20001122192 and 20001122201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500140273 + ... + 2500140280.

Almost surely, 2^20001122212 is an apocalyptic number.

It is an amenable number.

20001122212 is a deficient number, since it is larger than the sum of its proper divisors (15000841666).

20001122212 is a wasteful number, since it uses less digits than its factorization.

20001122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000280557 (or 5000280555 counting only the distinct ones).

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

Adding to 20001122212 its reverse (21222110002), we get a palindrome (41223232214).

The spelling of 20001122212 in words is "twenty billion, one million, one hundred twenty-two thousand, two hundred twelve".