122012121121 has 4 divisors (see below), whose sum is σ = 133104132144. Its totient is φ = 110920110100.

The previous prime is 122012121053. The next prime is 122012121151. The reversal of 122012121121 is 121121210221.

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 a de Polignac number, because none of the positive numbers 2^k-122012121121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122012121095 and 122012121104.

It is not an unprimeable number, because it can be changed into a prime (122012121151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5546005495 + ... + 5546005516.

It is an arithmetic number, because the mean of its divisors is an integer number (33276033036).

Almost surely, 2^122012121121 is an apocalyptic number.

122012121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122012121121 is a deficient number, since it is larger than the sum of its proper divisors (11092011023).

122012121121 is a wasteful number, since it uses less digits than its factorization.

122012121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092011022.

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

Adding to 122012121121 its reverse (121121210221), we get a palindrome (243133331342).

The spelling of 122012121121 in words is "one hundred twenty-two billion, twelve million, one hundred twenty-one thousand, one hundred twenty-one".