21202222121029 has 2 divisors, whose sum is σ = 21202222121030. Its totient is φ = 21202222121028.

The previous prime is 21202222120991. The next prime is 21202222121057. The reversal of 21202222121029 is 92012122220212.

It is an a-pointer prime, because the next prime (21202222121057) can be obtained adding 21202222121029 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17966594644804 + 3235627476225 = 4238702^2 + 1798785^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202222121029 - 2¹⁵ = 21202222088261 is a prime.

It is a super-3 number, since 3×21202222121029³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21202222120988 and 21202222121006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202222121329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601111060514 + 10601111060515.

It is an arithmetic number, because the mean of its divisors is an integer number (10601111060515).

Almost surely, 2^{21202222121029} is an apocalyptic number.

It is an amenable number.

21202222121029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202222121029 is an equidigital number, since it uses as much as digits as its factorization.

21202222121029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 21202222121029 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-nine".