21020222029 has 2 divisors, whose sum is σ = 21020222030. Its totient is φ = 21020222028.

The previous prime is 21020221997. The next prime is 21020222059. The reversal of 21020222029 is 92022202012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18292562500 + 2727659529 = 135250^2 + 52227^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020222029 - 2⁵ = 21020221997 is a prime.

It is a super-3 number, since 3×21020222029³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020222059) 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, 10510111014 + 10510111015.

It is an arithmetic number, because the mean of its divisors is an integer number (10510111015).

Almost surely, 2^21020222029 is an apocalyptic number.

It is an amenable number.

21020222029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020222029 is an equidigital number, since it uses as much as digits as its factorization.

21020222029 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 22.

It can be divided in two parts, 21020 and 222029, that added together give a square (243049 = 493²).

The spelling of 21020222029 in words is "twenty-one billion, twenty million, two hundred twenty-two thousand, twenty-nine".