2121187433 has 2 divisors, whose sum is σ = 2121187434. Its totient is φ = 2121187432.

The previous prime is 2121187391. The next prime is 2121187447. The reversal of 2121187433 is 3347811212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2120418304 + 769129 = 46048^2 + 877^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121187433 - 2¹⁰ = 2121186409 is a prime.

It is a super-2 number, since 2×2121187433² = 8998872251834258978, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121187433.

It is not a weakly prime, because it can be changed into another prime (2121187333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060593716 + 1060593717.

It is an arithmetic number, because the mean of its divisors is an integer number (1060593717).

Almost surely, 2^2121187433 is an apocalyptic number.

It is an amenable number.

2121187433 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121187433 is an equidigital number, since it uses as much as digits as its factorization.

2121187433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 2121187433 is about 46056.3506261623. The cubic root of 2121187433 is about 1284.8714579188.

Adding to 2121187433 its reverse (3347811212), we get a palindrome (5468998645).

The spelling of 2121187433 in words is "two billion, one hundred twenty-one million, one hundred eighty-seven thousand, four hundred thirty-three".