121212112310 has 16 divisors (see below), whose sum is σ = 218186032752. Its totient is φ = 48483904800.

The previous prime is 121212112291. The next prime is 121212112339. The reversal of 121212112310 is 13211212121.

It is a happy number.

It is a super-3 number, since 3×121212112310³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 684905 + ... + 843515.

It is an arithmetic number, because the mean of its divisors is an integer number (13636627047).

Almost surely, 2^121212112310 is an apocalyptic number.

121212112310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212112310 is a deficient number, since it is larger than the sum of its proper divisors (96973920442).

121212112310 is a wasteful number, since it uses less digits than its factorization.

121212112310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235039.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121212112310 its reverse (13211212121), we get a palindrome (134423324431).

The spelling of 121212112310 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, three hundred ten".