2133231421 has 2 divisors, whose sum is σ = 2133231422. Its totient is φ = 2133231420.

The previous prime is 2133231413. The next prime is 2133231431. The reversal of 2133231421 is 1241323312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1671583225 + 461648196 = 40885^2 + 21486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133231421 - 2³ = 2133231413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2133231392 and 2133231401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2133231431) 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 as a sum of consecutive naturals, namely, 1066615710 + 1066615711.

It is an arithmetic number, because the mean of its divisors is an integer number (1066615711).

Almost surely, 2^2133231421 is an apocalyptic number.

It is an amenable number.

2133231421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2133231421 is an equidigital number, since it uses as much as digits as its factorization.

2133231421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 2133231421 is about 46186.9182886237. The cubic root of 2133231421 is about 1287.2986801319.

Adding to 2133231421 its reverse (1241323312), we get a palindrome (3374554733).

The spelling of 2133231421 in words is "two billion, one hundred thirty-three million, two hundred thirty-one thousand, four hundred twenty-one".