122012200220221 has 4 divisors (see below), whose sum is σ = 122037656557212. Its totient is φ = 121986743883232.

The previous prime is 122012200220161. The next prime is 122012200220263. The reversal of 122012200220221 is 122022002210221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69295452223321 + 52716747996900 = 8324389^2 + 7260630^2 .

It is a cyclic number.

It is not a de Polignac number, because 122012200220221 - 2¹⁷ = 122012200089149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122012200220321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12728161306 + ... + 12728170891.

It is an arithmetic number, because the mean of its divisors is an integer number (30509414139303).

Almost surely, 2^{122012200220221} is an apocalyptic number.

It is an amenable number.

122012200220221 is a deficient number, since it is larger than the sum of its proper divisors (25456336991).

122012200220221 is an equidigital number, since it uses as much as digits as its factorization.

122012200220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25456336990.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 122012200220221 its reverse (122022002210221), we get a palindrome (244034202430442).

The spelling of 122012200220221 in words is "one hundred twenty-two trillion, twelve billion, two hundred million, two hundred twenty thousand, two hundred twenty-one".