201100012122221 has 8 divisors (see below), whose sum is σ = 203669314732800. Its totient is φ = 198531302832720.

The previous prime is 201100012122193. The next prime is 201100012122283. The reversal of 201100012122221 is 122221210001102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201100012122221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201100012122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201100012122521) 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, 147648041 + ... + 149003838.

It is an arithmetic number, because the mean of its divisors is an integer number (25458664341600).

Almost surely, 2^{201100012122221} is an apocalyptic number.

It is an amenable number.

201100012122221 is a deficient number, since it is larger than the sum of its proper divisors (2569302610579).

201100012122221 is an equidigital number, since it uses as much as digits as its factorization.

201100012122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296660539.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201100012122221 its reverse (122221210001102), we get a palindrome (323321222123323).

The spelling of 201100012122221 in words is "two hundred one trillion, one hundred billion, twelve million, one hundred twenty-two thousand, two hundred twenty-one".