2121232433 has 2 divisors, whose sum is σ = 2121232434. Its totient is φ = 2121232432.

The previous prime is 2121232429. The next prime is 2121232469. The reversal of 2121232433 is 3342321212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1931426704 + 189805729 = 43948^2 + 13777^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121232433 - 2² = 2121232429 is a prime.

It is a super-2 number, since 2×2121232433² = 8999254069622198978, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2121232399 and 2121232408.

It is not a weakly prime, because it can be changed into another prime (2121232493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060616216 + 1060616217.

It is an arithmetic number, because the mean of its divisors is an integer number (1060616217).

Almost surely, 2^2121232433 is an apocalyptic number.

It is an amenable number.

2121232433 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121232433 is an equidigital number, since it uses as much as digits as its factorization.

2121232433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 2121232433 is about 46056.8391555478. The cubic root of 2121232433 is about 1284.8805438370.

Adding to 2121232433 its reverse (3342321212), we get a palindrome (5463553645).

The spelling of 2121232433 in words is "two billion, one hundred twenty-one million, two hundred thirty-two thousand, four hundred thirty-three".