211121220120012 has 36 divisors (see below), whose sum is σ = 533757387323160. Its totient is φ = 70361890542912.

The previous prime is 211121220120007. The next prime is 211121220120049. The reversal of 211121220120012 is 210021022121112.

211121220120012 is a `hidden beast` number, since 211 + 1 + 21 + 220 + 1 + 200 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 493512273 + ... + 493939880.

It is an arithmetic number, because the mean of its divisors is an integer number (14826594092310).

Almost surely, 2^{211121220120012} is an apocalyptic number.

It is an amenable number.

211121220120012 is an abundant number, since it is smaller than the sum of its proper divisors (322636167203148).

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

211121220120012 is a wasteful number, since it uses less digits than its factorization.

211121220120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987458102 (or 987458097 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211121220120012 its reverse (210021022121112), we get a palindrome (421142242241124).

The spelling of 211121220120012 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, twelve".