20221129 has 12 divisors (see below), whose sum is σ = 21260164. Its totient is φ = 19217952.

The previous prime is 20221127. The next prime is 20221133. The reversal of 20221129 is 92112202.

It can be written as a sum of positive squares in 2 ways, for example, as 12531600 + 7689529 = 3540^2 + 2773^2 .

It is not a de Polignac number, because 20221129 - 2¹ = 20221127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128719 + ... + 128875.

Almost surely, 2^20221129 is an apocalyptic number.

It is an amenable number.

20221129 is a deficient number, since it is larger than the sum of its proper divisors (1039035).

20221129 is an equidigital number, since it uses as much as digits as its factorization.

20221129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 20221129 is about 4496.7909669007. The cubic root of 20221129 is about 272.4384912936.

The spelling of 20221129 in words is "twenty million, two hundred twenty-one thousand, one hundred twenty-nine".