21020122202029 has 2 divisors, whose sum is σ = 21020122202030. Its totient is φ = 21020122202028.

The previous prime is 21020122202003. The next prime is 21020122202039. The reversal of 21020122202029 is 92020222102012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19786501032804 + 1233621169225 = 4448202^2 + 1110685^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020122202029 - 2¹¹ = 21020122199981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21020122201994 and 21020122202012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020122202039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510061101014 + 10510061101015.

It is an arithmetic number, because the mean of its divisors is an integer number (10510061101015).

Almost surely, 2^{21020122202029} is an apocalyptic number.

It is an amenable number.

21020122202029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020122202029 is an equidigital number, since it uses as much as digits as its factorization.

21020122202029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 21020122202029 in words is "twenty-one trillion, twenty billion, one hundred twenty-two million, two hundred two thousand, twenty-nine".