122320216310521 has 4 divisors (see below), whose sum is σ = 122320299365712. Its totient is φ = 122320133255332.

The previous prime is 122320216310507. The next prime is 122320216310557. The reversal of 122320216310521 is 125013612023221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122320216310521 - 2⁵ = 122320216310489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122320216310581) 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, 39277831 + ... + 42277516.

It is an arithmetic number, because the mean of its divisors is an integer number (30580074841428).

Almost surely, 2^{122320216310521} is an apocalyptic number.

It is an amenable number.

122320216310521 is a deficient number, since it is larger than the sum of its proper divisors (83055191).

122320216310521 is an equidigital number, since it uses as much as digits as its factorization.

122320216310521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83055190.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 122320216310521 its reverse (125013612023221), we get a palindrome (247333828333742).

The spelling of 122320216310521 in words is "one hundred twenty-two trillion, three hundred twenty billion, two hundred sixteen million, three hundred ten thousand, five hundred twenty-one".