201221102212212 has 96 divisors (see below), whose sum is σ = 490719409689600. Its totient is φ = 64054100436480.

The previous prime is 201221102212171. The next prime is 201221102212213. The reversal of 201221102212212 is 212212201122102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221102212213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 511346412 + ... + 511739772.

It is an arithmetic number, because the mean of its divisors is an integer number (5111660517600).

Almost surely, 2^{201221102212212} is an apocalyptic number.

It is an amenable number.

201221102212212 is an abundant number, since it is smaller than the sum of its proper divisors (289498307477388).

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

201221102212212 is a wasteful number, since it uses less digits than its factorization.

201221102212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396373 (or 396371 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 201221102212212 its reverse (212212201122102), we get a palindrome (413433303334314).

The spelling of 201221102212212 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred two million, two hundred twelve thousand, two hundred twelve".