211111100012 has 24 divisors (see below), whose sum is σ = 370217444352. Its totient is φ = 105334866000.

The previous prime is 211111099951. The next prime is 211111100023. The reversal of 211111100012 is 210001111112.

It is a junction number, because it is equal to n+sod(n) for n = 211111099966 and 211111100002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4996937 + ... + 5039007.

It is an arithmetic number, because the mean of its divisors is an integer number (15425726848).

Almost surely, 2^211111100012 is an apocalyptic number.

It is an amenable number.

211111100012 is a deficient number, since it is larger than the sum of its proper divisors (159106344340).

211111100012 is a wasteful number, since it uses less digits than its factorization.

211111100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44669 (or 44667 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 211111100012 its reverse (210001111112), we get a palindrome (421112211124).

The spelling of 211111100012 in words is "two hundred eleven billion, one hundred eleven million, one hundred thousand, twelve".