122021211121 has 4 divisors (see below), whose sum is σ = 122025966244. Its totient is φ = 122016456000.

The previous prime is 122021211119. The next prime is 122021211149. The reversal of 122021211121 is 121112120221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121112120221 = 109 ⋅1111120369.

It can be written as a sum of positive squares in 2 ways, for example, as 70988142096 + 51033069025 = 266436^2 + 225905^2 .

It is a cyclic number.

It is not a de Polignac number, because 122021211121 - 2¹ = 122021211119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122021211095 and 122021211104.

It is not an unprimeable number, because it can be changed into a prime (122021214121) 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, 2338860 + ... + 2390461.

It is an arithmetic number, because the mean of its divisors is an integer number (30506491561).

Almost surely, 2^122021211121 is an apocalyptic number.

It is an amenable number.

122021211121 is a deficient number, since it is larger than the sum of its proper divisors (4755123).

122021211121 is an equidigital number, since it uses as much as digits as its factorization.

122021211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 122021211121 its reverse (121112120221), we get a palindrome (243133331342).

The spelling of 122021211121 in words is "one hundred twenty-two billion, twenty-one million, two hundred eleven thousand, one hundred twenty-one".