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22129 has 2 divisors, whose sum is σ = 22130. Its totient is φ = 22128.

The previous prime is 22123. The next prime is 22133. The reversal of 22129 is 92122.

Adding to 22129 its product of digits (72), we get a square (22201 = 1492).

It can be divided in two parts, 22 and 129, that added together give a palindrome (151).

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21904 + 225 = 148^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 22129 - 29 = 21617 is a prime.

It is not a weakly prime, because it can be changed into another prime (22123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11064 + 11065.

It is an arithmetic number, because the mean of its divisors is an integer number (11065).

222129 is an apocalyptic number.

It is an amenable number.

22129 is a deficient number, since it is larger than the sum of its proper divisors (1).

22129 is an equidigital number, since it uses as much as digits as its factorization.

22129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 16.

The square root of 22129 is about 148.7581930517. The cubic root of 22129 is about 28.0750537414.

The spelling of 22129 in words is "twenty-two thousand, one hundred twenty-nine".