20001111212 has 6 divisors (see below), whose sum is σ = 35001944628. Its totient is φ = 10000555604.

The previous prime is 20001111173. The next prime is 20001111233. The reversal of 20001111212 is 21211110002.

It is a junction number, because it is equal to n+sod(n) for n = 20001111193 and 20001111202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500138898 + ... + 2500138905.

It is an arithmetic number, because the mean of its divisors is an integer number (5833657438).

Almost surely, 2^20001111212 is an apocalyptic number.

It is an amenable number.

20001111212 is a deficient number, since it is larger than the sum of its proper divisors (15000833416).

20001111212 is a wasteful number, since it uses less digits than its factorization.

20001111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000277807 (or 5000277805 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20001111212 its reverse (21211110002), we get a palindrome (41212221214).

The spelling of 20001111212 in words is "twenty billion, one million, one hundred eleven thousand, two hundred twelve".