122311125401221 has 4 divisors (see below), whose sum is σ = 122311150491244. Its totient is φ = 122311100311200.

The previous prime is 122311125401203. The next prime is 122311125401249. The reversal of 122311125401221 is 122104521113221.

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 93652651404900 + 28658473996321 = 9677430^2 + 5353361^2 .

It is a cyclic number.

It is not a de Polignac number, because 122311125401221 - 2²⁵ = 122311091846789 is a prime.

It is a super-2 number, since 2×122311125401221² (a number of 29 digits) contains 22 as substring.

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 122311125401221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122311125408221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2610000 + ... + 15856681.

It is an arithmetic number, because the mean of its divisors is an integer number (30577787622811).

Almost surely, 2^{122311125401221} is an apocalyptic number.

It is an amenable number.

122311125401221 is a deficient number, since it is larger than the sum of its proper divisors (25090023).

122311125401221 is an equidigital number, since it uses as much as digits as its factorization.

122311125401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25090022.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 122311125401221 its reverse (122104521113221), we get a palindrome (244415646514442).

The spelling of 122311125401221 in words is "one hundred twenty-two trillion, three hundred eleven billion, one hundred twenty-five million, four hundred one thousand, two hundred twenty-one".