121212223002123 has 32 divisors (see below), whose sum is σ = 178062125548032. Its totient is φ = 72731418144000.

The previous prime is 121212223002121. The next prime is 121212223002191. The reversal of 121212223002123 is 321200322212121.

It is not a de Polignac number, because 121212223002123 - 2¹ = 121212223002121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121212223002093 and 121212223002102.

It is not an unprimeable number, because it can be changed into a prime (121212223002121) 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 31 ways as a sum of consecutive naturals, for example, 76349911 + ... + 77921327.

It is an arithmetic number, because the mean of its divisors is an integer number (5564441423376).

Almost surely, 2^{121212223002123} is an apocalyptic number.

121212223002123 is a deficient number, since it is larger than the sum of its proper divisors (56849902545909).

121212223002123 is a wasteful number, since it uses less digits than its factorization.

121212223002123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594675.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 121212223002123 its reverse (321200322212121), we get a palindrome (442412545214244).

The spelling of 121212223002123 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-three million, two thousand, one hundred twenty-three".