201221210010012 has 24 divisors (see below), whose sum is σ = 475947884865936. Its totient is φ = 66154918359168.

The previous prime is 201221210010011. The next prime is 201221210010017. The reversal of 201221210010012 is 210010012122102.

It is a junction number, because it is equal to n+sod(n) for n = 201221210009973 and 201221210010000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221210010011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114852287943 + ... + 114852289694.

It is an arithmetic number, because the mean of its divisors is an integer number (19831161869414).

Almost surely, 2^{201221210010012} is an apocalyptic number.

It is an amenable number.

201221210010012 is an abundant number, since it is smaller than the sum of its proper divisors (274726674855924).

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

201221210010012 is a wasteful number, since it uses less digits than its factorization.

201221210010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229704577717 (or 229704577715 counting only the distinct ones).

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

Adding to 201221210010012 its reverse (210010012122102), we get a palindrome (411231222132114).

The spelling of 201221210010012 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred ten million, ten thousand, twelve".