1212021109973 has 8 divisors (see below), whose sum is σ = 1215042476760. Its totient is φ = 1209000026880.

The previous prime is 1212021109961. The next prime is 1212021109997. The reversal of 1212021109973 is 3799011202121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 68923204 + 1211952186769 = 8302^2 + 1100887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212021109973 - 2²⁴ = 1212004332757 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 (1212021129973) 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 7 ways as a sum of consecutive naturals, for example, 10403063 + ... + 10518923.

It is an arithmetic number, because the mean of its divisors is an integer number (151880309595).

Almost surely, 2^{1212021109973} is an apocalyptic number.

It is an amenable number.

1212021109973 is a deficient number, since it is larger than the sum of its proper divisors (3021366787).

1212021109973 is a wasteful number, since it uses less digits than its factorization.

1212021109973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141847.

The product of its (nonzero) digits is 13608, while the sum is 38.

The spelling of 1212021109973 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred nine thousand, nine hundred seventy-three".