2231021329 has 2 divisors, whose sum is σ = 2231021330. Its totient is φ = 2231021328.

The previous prime is 2231021327. The next prime is 2231021347. The reversal of 2231021329 is 9231201322.

2231021329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2164761729 + 66259600 = 46527^2 + 8140^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231021329 - 2¹ = 2231021327 is a prime.

It is a super-3 number, since 3×2231021329³ (a number of 29 digits) contains 333 as substring.

Together with 2231021327, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2231021323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115510664 + 1115510665.

It is an arithmetic number, because the mean of its divisors is an integer number (1115510665).

Almost surely, 2^2231021329 is an apocalyptic number.

It is an amenable number.

2231021329 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231021329 is an equidigital number, since it uses as much as digits as its factorization.

2231021329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2231021329 is about 47233.6884966652. The cubic root of 2231021329 is about 1306.6759790034.

The spelling of 2231021329 in words is "two billion, two hundred thirty-one million, twenty-one thousand, three hundred twenty-nine".