211121210012 has 24 divisors (see below), whose sum is σ = 391279814016. Its totient is φ = 99463980528.

The previous prime is 211121210011. The next prime is 211121210101. The reversal of 211121210012 is 210012121112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121210011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17119178 + ... + 17131505.

It is an arithmetic number, because the mean of its divisors is an integer number (16303325584).

Almost surely, 2^211121210012 is an apocalyptic number.

It is an amenable number.

211121210012 is a deficient number, since it is larger than the sum of its proper divisors (180158604004).

211121210012 is a wasteful number, since it uses less digits than its factorization.

211121210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34250777 (or 34250775 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211121210012 its reverse (210012121112), we get a palindrome (421133331124).

The spelling of 211121210012 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred ten thousand, twelve".