122222220220321 has 4 divisors (see below), whose sum is σ = 131623929468052. Its totient is φ = 112820510972592.

The previous prime is 122222220220319. The next prime is 122222220220349. The reversal of 122222220220321 is 123022022222221.

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 9663170142096 + 112559050078225 = 3108564^2 + 10609385^2 .

It is a cyclic number.

It is not a de Polignac number, because 122222220220321 - 2¹ = 122222220220319 is a prime.

It is a super-2 number, since 2×122222220220321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122222220220621) 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, 4700854623846 + ... + 4700854623871.

It is an arithmetic number, because the mean of its divisors is an integer number (32905982367013).

Almost surely, 2^{122222220220321} is an apocalyptic number.

It is an amenable number.

122222220220321 is a deficient number, since it is larger than the sum of its proper divisors (9401709247731).

122222220220321 is an equidigital number, since it uses as much as digits as its factorization.

122222220220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9401709247730.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 122222220220321 its reverse (123022022222221), we get a palindrome (245244242442542).

The spelling of 122222220220321 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twenty thousand, three hundred twenty-one".