2121243036683 has 2 divisors, whose sum is σ = 2121243036684. Its totient is φ = 2121243036682.

The previous prime is 2121243036637. The next prime is 2121243036697. The reversal of 2121243036683 is 3866303421212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121243036683 - 2²² = 2121238842379 is a prime.

It is a super-2 number, since 2×2121243036683² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121243036683.

It is not a weakly prime, because it can be changed into another prime (2121243036383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060621518341 + 1060621518342.

It is an arithmetic number, because the mean of its divisors is an integer number (1060621518342).

Almost surely, 2^{2121243036683} is an apocalyptic number.

2121243036683 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121243036683 is an equidigital number, since it uses as much as digits as its factorization.

2121243036683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 41.

Adding to 2121243036683 its reverse (3866303421212), we get a palindrome (5987546457895).

The spelling of 2121243036683 in words is "two trillion, one hundred twenty-one billion, two hundred forty-three million, thirty-six thousand, six hundred eighty-three".