201201000122221 has 16 divisors (see below), whose sum is σ = 222165561682368. Its totient is φ = 180690208192000.

The previous prime is 201201000122203. The next prime is 201201000122279. The reversal of 201201000122221 is 122221000102102.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201201000122221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201201000122195 and 201201000122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201000162221) 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, 203908516 + ... + 204892861.

It is an arithmetic number, because the mean of its divisors is an integer number (13885347605148).

Almost surely, 2^{201201000122221} is an apocalyptic number.

It is an amenable number.

201201000122221 is a deficient number, since it is larger than the sum of its proper divisors (20964561560147).

201201000122221 is a wasteful number, since it uses less digits than its factorization.

201201000122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408801932.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201201000122221 its reverse (122221000102102), we get a palindrome (323422000224323).

The spelling of 201201000122221 in words is "two hundred one trillion, two hundred one billion, one hundred twenty-two thousand, two hundred twenty-one".