121212122111110 has 16 divisors (see below), whose sum is σ = 218181948787296. Its totient is φ = 48484820180608.

The previous prime is 121212122111099. The next prime is 121212122111117. The reversal of 121212122111110 is 11111221212121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212122111117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25150239 + ... + 29579701.

It is an arithmetic number, because the mean of its divisors is an integer number (13636371799206).

Almost surely, 2^{121212122111110} is an apocalyptic number.

121212122111110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212122111110 is a deficient number, since it is larger than the sum of its proper divisors (96969826676186).

121212122111110 is a wasteful number, since it uses less digits than its factorization.

121212122111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7165967.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121212122111110 its reverse (11111221212121), we get a palindrome (132323343323231).

The spelling of 121212122111110 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred eleven thousand, one hundred ten".