221201020012 has 48 divisors (see below), whose sum is σ = 467174525440. Its totient is φ = 89523937152.

The previous prime is 221201019997. The next prime is 221201020013. The reversal of 221201020012 is 210020102122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221201019974 and 221201020001.

It is not an unprimeable number, because it can be changed into a prime (221201020013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497688 + ... + 830719.

Almost surely, 2^221201020012 is an apocalyptic number.

It is an amenable number.

221201020012 is an abundant number, since it is smaller than the sum of its proper divisors (245973505428).

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

221201020012 is a wasteful number, since it uses less digits than its factorization.

221201020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328750 (or 1328748 counting only the distinct ones).

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

Adding to 221201020012 its reverse (210020102122), we get a palindrome (431221122134).

The spelling of 221201020012 in words is "two hundred twenty-one billion, two hundred one million, twenty thousand, twelve".