1212642462121 has 16 divisors (see below), whose sum is σ = 1244514096144. Its totient is φ = 1181271942144.

The previous prime is 1212642462049. The next prime is 1212642462137.

1212642462121 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 8 ways, for example, as 517104810000 + 695537652121 = 719100^2 + 833989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212642462121 - 2³⁵ = 1178282723753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212642462191) 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, 1662451 + ... + 2277943.

It is an arithmetic number, because the mean of its divisors is an integer number (77782131009).

Almost surely, 2^{1212642462121} is an apocalyptic number.

It is an amenable number.

1212642462121 is a deficient number, since it is larger than the sum of its proper divisors (31871634023).

1212642462121 is a wasteful number, since it uses less digits than its factorization.

1212642462121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615900.

The product of its digits is 18432, while the sum is 34.

The spelling of 1212642462121 in words is "one trillion, two hundred twelve billion, six hundred forty-two million, four hundred sixty-two thousand, one hundred twenty-one".