2201201212221 has 32 divisors (see below), whose sum is σ = 3583464105600. Its totient is φ = 1324323642240.

The previous prime is 2201201212211. The next prime is 2201201212253. The reversal of 2201201212221 is 1222121021022.

It is a happy number.

2201201212221 is a `hidden beast` number, since 220 + 1 + 201 + 21 + 2 + 221 = 666.

It is not a de Polignac number, because 2201201212221 - 2¹³ = 2201201204029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201201212194 and 2201201212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201201212211) 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, 27008406 + ... + 27089783.

It is an arithmetic number, because the mean of its divisors is an integer number (111983253300).

Almost surely, 2^{2201201212221} is an apocalyptic number.

It is an amenable number.

2201201212221 is a deficient number, since it is larger than the sum of its proper divisors (1382262893379).

2201201212221 is a wasteful number, since it uses less digits than its factorization.

2201201212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54098346 (or 54098340 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2201201212221 its reverse (1222121021022), we get a palindrome (3423322233243).

It can be divided in two parts, 220120 and 1212221, that added together give a palindrome (1432341).

The spelling of 2201201212221 in words is "two trillion, two hundred one billion, two hundred one million, two hundred twelve thousand, two hundred twenty-one".