201221112221012 has 48 divisors (see below), whose sum is σ = 383100060575232. Its totient is φ = 91922722972800.

The previous prime is 201221112220967. The next prime is 201221112221029. The reversal of 201221112221012 is 210122211122102.

It is a super-2 number, since 2×201221112221012² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10584263 + ... + 22681905.

It is an arithmetic number, because the mean of its divisors is an integer number (7981251261984).

Almost surely, 2^{201221112221012} is an apocalyptic number.

It is an amenable number.

201221112221012 is a deficient number, since it is larger than the sum of its proper divisors (181878948354220).

201221112221012 is a wasteful number, since it uses less digits than its factorization.

201221112221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12100928 (or 12100926 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201221112221012 its reverse (210122211122102), we get a palindrome (411343323343114).

The spelling of 201221112221012 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, twelve".