122112221212121 has 4 divisors (see below), whose sum is σ = 139556824242432. Its totient is φ = 104667618181812.

The previous prime is 122112221212087. The next prime is 122112221212171. The reversal of 122112221212121 is 121212122211221.

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 not a de Polignac number, because 122112221212121 - 2³⁸ = 121837343305177 is a prime.

It is a super-2 number, since 2×122112221212121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

122112221212121 is a modest number, since divided by 21212121 gives 1221122 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122112221212171) 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, 8722301515145 + ... + 8722301515158.

It is an arithmetic number, because the mean of its divisors is an integer number (34889206060608).

Almost surely, 2^{122112221212121} is an apocalyptic number.

It is an amenable number.

122112221212121 is a deficient number, since it is larger than the sum of its proper divisors (17444603030311).

122112221212121 is an equidigital number, since it uses as much as digits as its factorization.

122112221212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17444603030310.

The product of its digits is 256, while the sum is 23.

Adding to 122112221212121 its reverse (121212122211221), we get a palindrome (243324343423342).

The spelling of 122112221212121 in words is "one hundred twenty-two trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".