21222220002029 has 2 divisors, whose sum is σ = 21222220002030. Its totient is φ = 21222220002028.

The previous prime is 21222220001993. The next prime is 21222220002047. The reversal of 21222220002029 is 92020002222212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18649243599529 + 2572976402500 = 4318477^2 + 1604050^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222220002029 - 2³⁶ = 21153500525293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21222220001989 and 21222220002007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222220002079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611110001014 + 10611110001015.

It is an arithmetic number, because the mean of its divisors is an integer number (10611110001015).

Almost surely, 2^{21222220002029} is an apocalyptic number.

It is an amenable number.

21222220002029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222220002029 is an equidigital number, since it uses as much as digits as its factorization.

21222220002029 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 26.

The spelling of 21222220002029 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, two thousand, twenty-nine".