121212202223 has 8 divisors (see below), whose sum is σ = 138540859392. Its totient is φ = 103886702136.

The previous prime is 121212202211. The next prime is 121212202289. The reversal of 121212202223 is 322202212121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121212202223 - 2⁸ = 121212201967 is a prime.

It is a super-2 number, since 2×121212202223² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121212202195 and 121212202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212202523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706415 + ... + 861072.

It is an arithmetic number, because the mean of its divisors is an integer number (17317607424).

Almost surely, 2^121212202223 is an apocalyptic number.

121212202223 is a deficient number, since it is larger than the sum of its proper divisors (17328657169).

121212202223 is a wasteful number, since it uses less digits than its factorization.

121212202223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578541.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 121212202223 its reverse (322202212121), we get a palindrome (443414414344).

The spelling of 121212202223 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, two hundred twenty-three".