121212000101 has 4 divisors (see below), whose sum is σ = 128342117772. Its totient is φ = 114081882432.

The previous prime is 121212000097. The next prime is 121212000121. The reversal of 121212000101 is 101000212121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101000212121 = 157 ⋅643313453.

It can be written as a sum of positive squares in 2 ways, for example, as 104183055076 + 17028945025 = 322774^2 + 130495^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212000101 - 2² = 121212000097 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3565058810 + ... + 3565058843.

It is an arithmetic number, because the mean of its divisors is an integer number (32085529443).

Almost surely, 2^121212000101 is an apocalyptic number.

It is an amenable number.

121212000101 is a deficient number, since it is larger than the sum of its proper divisors (7130117671).

121212000101 is an equidigital number, since it uses as much as digits as its factorization.

121212000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7130117670.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121212000101 its reverse (101000212121), we get a palindrome (222212212222).

The spelling of 121212000101 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred one", and thus it is an aban number.