211121022012 has 12 divisors (see below), whose sum is σ = 492615718056. Its totient is φ = 70373674000.

The previous prime is 211121021981. The next prime is 211121022023. The reversal of 211121022012 is 210220121112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 211121021982 and 211121022000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8796709239 + ... + 8796709262.

It is an arithmetic number, because the mean of its divisors is an integer number (41051309838).

Almost surely, 2^211121022012 is an apocalyptic number.

It is an amenable number.

211121022012 is an abundant number, since it is smaller than the sum of its proper divisors (281494696044).

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

211121022012 is a wasteful number, since it uses less digits than its factorization.

211121022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17593418508 (or 17593418506 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211121022012 its reverse (210220121112), we get a palindrome (421341143124).

The spelling of 211121022012 in words is "two hundred eleven billion, one hundred twenty-one million, twenty-two thousand, twelve".