121212001012 has 12 divisors (see below), whose sum is σ = 212312281860. Its totient is φ = 60551349056.

The previous prime is 121212000989. The next prime is 121212001013. The reversal of 121212001012 is 210100212121.

It can be written as a sum of positive squares in 2 ways, for example, as 49513370256 + 71698630756 = 222516^2 + 267766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121212000983 and 121212001001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212001013) 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, 13657873 + ... + 13666744.

It is an arithmetic number, because the mean of its divisors is an integer number (17692690155).

Almost surely, 2^121212001012 is an apocalyptic number.

It is an amenable number.

121212001012 is a deficient number, since it is larger than the sum of its proper divisors (91100280848).

121212001012 is a wasteful number, since it uses less digits than its factorization.

121212001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27325730 (or 27325728 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121212001012 its reverse (210100212121), we get a palindrome (331312213133).

The spelling of 121212001012 in words is "one hundred twenty-one billion, two hundred twelve million, one thousand, twelve".