121212101110 has 32 divisors (see below), whose sum is σ = 223540575552. Its totient is φ = 47294392320.

The previous prime is 121212101107. The next prime is 121212101123. The reversal of 121212101110 is 11101212121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2841862 + ... + 2884198.

It is an arithmetic number, because the mean of its divisors is an integer number (6985642986).

Almost surely, 2^121212101110 is an apocalyptic number.

121212101110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212101110 is a deficient number, since it is larger than the sum of its proper divisors (102328474442).

121212101110 is a wasteful number, since it uses less digits than its factorization.

121212101110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49368.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121212101110 its reverse (11101212121), we get a palindrome (132313313231).

The spelling of 121212101110 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred one thousand, one hundred ten".