122320213121 has 4 divisors (see below), whose sum is σ = 122326220544. Its totient is φ = 122314205700.

The previous prime is 122320213111. The next prime is 122320213123. The reversal of 122320213121 is 121312023221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121312023221 = 719 ⋅168723259.

It is a cyclic number.

It is not a de Polignac number, because 122320213121 - 2²² = 122316018817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122320213093 and 122320213102.

It is not an unprimeable number, because it can be changed into a prime (122320213123) 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, 2973065 + ... + 3013926.

It is an arithmetic number, because the mean of its divisors is an integer number (30581555136).

Almost surely, 2^122320213121 is an apocalyptic number.

It is an amenable number.

122320213121 is a deficient number, since it is larger than the sum of its proper divisors (6007423).

122320213121 is an equidigital number, since it uses as much as digits as its factorization.

122320213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6007422.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 122320213121 its reverse (121312023221), we get a palindrome (243632236342).

The spelling of 122320213121 in words is "one hundred twenty-two billion, three hundred twenty million, two hundred thirteen thousand, one hundred twenty-one".