232121021989 has 2 divisors, whose sum is σ = 232121021990. Its totient is φ = 232121021988.

The previous prime is 232121021969. The next prime is 232121022011. The reversal of 232121021989 is 989120121232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144995693089 + 87125328900 = 380783^2 + 295170^2 .

It is a cyclic number.

It is not a de Polignac number, because 232121021989 - 2¹⁷ = 232120890917 is a prime.

It is a super-2 number, since 2×232121021989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232121021969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116060510994 + 116060510995.

It is an arithmetic number, because the mean of its divisors is an integer number (116060510995).

Almost surely, 2^232121021989 is an apocalyptic number.

It is an amenable number.

232121021989 is a deficient number, since it is larger than the sum of its proper divisors (1).

232121021989 is an equidigital number, since it uses as much as digits as its factorization.

232121021989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 232121021989 in words is "two hundred thirty-two billion, one hundred twenty-one million, twenty-one thousand, nine hundred eighty-nine".