211121022021012 has 36 divisors (see below), whose sum is σ = 561754766198080. Its totient is φ = 66669796427472.

The previous prime is 211121022021001. The next prime is 211121022021037. The reversal of 211121022021012 is 210120220121112.

211121022021012 is a `hidden beast` number, since 2 + 1 + 11 + 210 + 220 + 210 + 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 a congruent number.

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 in 11 ways as a sum of consecutive naturals, for example, 154328231788 + ... + 154328233155.

Almost surely, 2^{211121022021012} is an apocalyptic number.

It is an amenable number.

211121022021012 is an abundant number, since it is smaller than the sum of its proper divisors (350633744177068).

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

211121022021012 is a wasteful number, since it uses less digits than its factorization.

211121022021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308656464972 (or 308656464967 counting only the distinct ones).

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

Adding to 211121022021012 its reverse (210120220121112), we get a palindrome (421241242142124).

The spelling of 211121022021012 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty-two million, twenty-one thousand, twelve".