121212000111 has 16 divisors (see below), whose sum is σ = 166574733408. Its totient is φ = 78344179200.

The previous prime is 121212000097. The next prime is 121212000121. The reversal of 121212000111 is 111000212121.

It is not a de Polignac number, because 121212000111 - 2⁶ = 121212000047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212000121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1911870 + ... + 1974251.

It is an arithmetic number, because the mean of its divisors is an integer number (10410920838).

Almost surely, 2^121212000111 is an apocalyptic number.

121212000111 is a deficient number, since it is larger than the sum of its proper divisors (45362733297).

121212000111 is a wasteful number, since it uses less digits than its factorization.

121212000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886442.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121212000111 its reverse (111000212121), we get a palindrome (232212212232).

The spelling of 121212000111 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred eleven", and thus it is an aban number.