1212210121223 has 16 divisors (see below), whose sum is σ = 1300135173120. Its totient is φ = 1126193012736.

The previous prime is 1212210121183. The next prime is 1212210121267. The reversal of 1212210121223 is 3221210122121.

It is not a de Polignac number, because 1212210121223 - 2³⁸ = 937332214279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212210121195 and 1212210121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212210121123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328118 + ... + 1591251.

It is an arithmetic number, because the mean of its divisors is an integer number (81258448320).

Almost surely, 2^{1212210121223} is an apocalyptic number.

1212210121223 is a deficient number, since it is larger than the sum of its proper divisors (87925051897).

1212210121223 is a wasteful number, since it uses less digits than its factorization.

1212210121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919866.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1212210121223 its reverse (3221210122121), we get a palindrome (4433420243344).

The spelling of 1212210121223 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, two hundred twenty-three".