201200122221 has 32 divisors (see below), whose sum is σ = 318397098240. Its totient is φ = 110574944256.

The previous prime is 201200122159. The next prime is 201200122267. The reversal of 201200122221 is 122221002102.

It is not a de Polignac number, because 201200122221 - 2⁷ = 201200122093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201200122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201200122121) 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, 486246 + ... + 799271.

It is an arithmetic number, because the mean of its divisors is an integer number (9949909320).

Almost surely, 2^201200122221 is an apocalyptic number.

201200122221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201200122221 is a deficient number, since it is larger than the sum of its proper divisors (117196976019).

201200122221 is a wasteful number, since it uses less digits than its factorization.

201200122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285813.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201200122221 its reverse (122221002102), we get a palindrome (323421124323).

The spelling of 201200122221 in words is "two hundred one billion, two hundred million, one hundred twenty-two thousand, two hundred twenty-one".