201221200012 has 48 divisors (see below), whose sum is σ = 415665338368. Its totient is φ = 83407397760.

The previous prime is 201221199979. The next prime is 201221200051. The reversal of 201221200012 is 210002122102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201221199965 and 201221200001.

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, 1450048 + ... + 1582744.

Almost surely, 2^201221200012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201221200012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207832669184).

201221200012 is an abundant number, since it is smaller than the sum of its proper divisors (214444138356).

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

201221200012 is a wasteful number, since it uses less digits than its factorization.

201221200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134486 (or 134484 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201221200012 its reverse (210002122102), we get a palindrome (411223322114).

The spelling of 201221200012 in words is "two hundred one billion, two hundred twenty-one million, two hundred thousand, twelve".