32199121 has 2 divisors, whose sum is σ = 32199122. Its totient is φ = 32199120.

The previous prime is 32199119. The next prime is 32199127. The reversal of 32199121 is 12199123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25250625 + 6948496 = 5025^2 + 2636^2 .

It is a cyclic number.

It is not a de Polignac number, because 32199121 - 2¹ = 32199119 is a prime.

Together with 32199119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 32199121.

It is not a weakly prime, because it can be changed into another prime (32199127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16099560 + 16099561.

It is an arithmetic number, because the mean of its divisors is an integer number (16099561).

Almost surely, 2^32199121 is an apocalyptic number.

It is an amenable number.

32199121 is a deficient number, since it is larger than the sum of its proper divisors (1).

32199121 is an equidigital number, since it uses as much as digits as its factorization.

32199121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 28.

The square root of 32199121 is about 5674.4269314178. The cubic root of 32199121 is about 318.1373594060.

The spelling of 32199121 in words is "thirty-two million, one hundred ninety-nine thousand, one hundred twenty-one".