12121201001012 has 6 divisors (see below), whose sum is σ = 21212101751778. Its totient is φ = 6060600500504.

The previous prime is 12121201001011. The next prime is 12121201001023. The reversal of 12121201001012 is 21010010212121.

It can be written as a sum of positive squares in only one way, i.e., 12104651722276 + 16549278736 = 3479174^2 + 128644^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121201001011) 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 as a sum of consecutive naturals, namely, 1515150125123 + ... + 1515150125130.

It is an arithmetic number, because the mean of its divisors is an integer number (3535350291963).

Almost surely, 2^{12121201001012} is an apocalyptic number.

It is an amenable number.

12121201001012 is a deficient number, since it is larger than the sum of its proper divisors (9090900750766).

12121201001012 is a wasteful number, since it uses less digits than its factorization.

12121201001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030300250257 (or 3030300250255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12121201001012 its reverse (21010010212121), we get a palindrome (33131211213133).

The spelling of 12121201001012 in words is "twelve trillion, one hundred twenty-one billion, two hundred one million, one thousand, twelve".