20221211210129 has 2 divisors, whose sum is σ = 20221211210130. Its totient is φ = 20221211210128.

The previous prime is 20221211210117. The next prime is 20221211210159. The reversal of 20221211210129 is 92101211212202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19367392705600 + 853818504529 = 4400840^2 + 924023^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221211210129 - 2¹² = 20221211206033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20221211210098 and 20221211210107.

It is not a weakly prime, because it can be changed into another prime (20221211210159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110605605064 + 10110605605065.

It is an arithmetic number, because the mean of its divisors is an integer number (10110605605065).

Almost surely, 2^{20221211210129} is an apocalyptic number.

It is an amenable number.

20221211210129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221211210129 is an equidigital number, since it uses as much as digits as its factorization.

20221211210129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 20221211210129 in words is "twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-nine".