211121211210012 has 18 divisors (see below), whose sum is σ = 533667506114288. Its totient is φ = 70373737069992.

The previous prime is 211121211209899. The next prime is 211121211210017. The reversal of 211121211210012 is 210012112121112.

It is a happy number.

211121211210012 is a `hidden beast` number, since 211 + 1 + 21 + 211 + 210 + 0 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121211210017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2932239044548 + ... + 2932239044619.

Almost surely, 2^{211121211210012} is an apocalyptic number.

It is an amenable number.

211121211210012 is an abundant number, since it is smaller than the sum of its proper divisors (322546294904276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211121211210012 is a wasteful number, since it uses less digits than its factorization.

211121211210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5864478089177 (or 5864478089172 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211121211210012 its reverse (210012112121112), we get a palindrome (421133323331124).

The spelling of 211121211210012 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, twelve".