21222052413629 has 2 divisors, whose sum is σ = 21222052413630. Its totient is φ = 21222052413628.

The previous prime is 21222052413607. The next prime is 21222052413643. The reversal of 21222052413629 is 92631425022212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18802543716100 + 2419508697529 = 4336190^2 + 1555477^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222052413629 - 2¹⁶ = 21222052348093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222052418629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611026206814 + 10611026206815.

It is an arithmetic number, because the mean of its divisors is an integer number (10611026206815).

Almost surely, 2^{21222052413629} is an apocalyptic number.

It is an amenable number.

21222052413629 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222052413629 is an equidigital number, since it uses as much as digits as its factorization.

21222052413629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 21222052413629 in words is "twenty-one trillion, two hundred twenty-two billion, fifty-two million, four hundred thirteen thousand, six hundred twenty-nine".