1212021140243 has 4 divisors (see below), whose sum is σ = 1212083311488. Its totient is φ = 1211958969000.

The previous prime is 1212021140203. The next prime is 1212021140249. The reversal of 1212021140243 is 3420411202121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212021140243 - 2²⁸ = 1211752704787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212021140249) 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, 31056371 + ... + 31095372.

It is an arithmetic number, because the mean of its divisors is an integer number (303020827872).

Almost surely, 2^{1212021140243} is an apocalyptic number.

1212021140243 is a deficient number, since it is larger than the sum of its proper divisors (62171245).

1212021140243 is an equidigital number, since it uses as much as digits as its factorization.

1212021140243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62171244.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1212021140243 its reverse (3420411202121), we get a palindrome (4632432342364).

The spelling of 1212021140243 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred forty thousand, two hundred forty-three".