121212102122111 has 96 divisors (see below), whose sum is σ = 167774627220480. Its totient is φ = 86068953734400.

The previous prime is 121212102122057. The next prime is 121212102122173. The reversal of 121212102122111 is 111221201212121.

It is a happy number.

It is not a de Polignac number, because 121212102122111 - 2¹⁴ = 121212102105727 is a prime.

It is a super-2 number, since 2×121212102122111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212102182111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5104300340 + ... + 5104324086.

It is an arithmetic number, because the mean of its divisors is an integer number (1747652366880).

Almost surely, 2^{121212102122111} is an apocalyptic number.

121212102122111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121212102122111 is a deficient number, since it is larger than the sum of its proper divisors (46562525098369).

121212102122111 is a wasteful number, since it uses less digits than its factorization.

121212102122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33085 (or 33078 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 121212102122111 its reverse (111221201212121), we get a palindrome (232433303334232).

The spelling of 121212102122111 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred two million, one hundred twenty-two thousand, one hundred eleven".