20100111212 has 6 divisors (see below), whose sum is σ = 35175194628. Its totient is φ = 10050055604.

The previous prime is 20100111203. The next prime is 20100111253. The reversal of 20100111212 is 21211100102.

It is a junction number, because it is equal to n+sod(n) for n = 20100111193 and 20100111202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2512513898 + ... + 2512513905.

It is an arithmetic number, because the mean of its divisors is an integer number (5862532438).

Almost surely, 2^20100111212 is an apocalyptic number.

It is an amenable number.

20100111212 is a deficient number, since it is larger than the sum of its proper divisors (15075083416).

20100111212 is a wasteful number, since it uses less digits than its factorization.

20100111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025027807 (or 5025027805 counting only the distinct ones).

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

Adding to 20100111212 its reverse (21211100102), we get a palindrome (41311211314).

The spelling of 20100111212 in words is "twenty billion, one hundred million, one hundred eleven thousand, two hundred twelve".