211121021221012 has 24 divisors (see below), whose sum is σ = 447079809645504. Its totient is φ = 85158058979712.

The previous prime is 211121021221007. The next prime is 211121021221027. The reversal of 211121021221012 is 210122120121112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221765778118 + ... + 221765779069.

It is an arithmetic number, because the mean of its divisors is an integer number (18628325401896).

Almost surely, 2^{211121021221012} is an apocalyptic number.

It is an amenable number.

211121021221012 is an abundant number, since it is smaller than the sum of its proper divisors (235958788424492).

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

211121021221012 is a wasteful number, since it uses less digits than its factorization.

211121021221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443531557215 (or 443531557213 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211121021221012 its reverse (210122120121112), we get a palindrome (421243141342124).

The spelling of 211121021221012 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-one thousand, twelve".