21214204244029 has 2 divisors, whose sum is σ = 21214204244030. Its totient is φ = 21214204244028.

The previous prime is 21214204244021. The next prime is 21214204244047. The reversal of 21214204244029 is 92044240241212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12368796624900 + 8845407619129 = 3516930^2 + 2974123^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214204244029 - 2³ = 21214204244021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214204244021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607102122014 + 10607102122015.

It is an arithmetic number, because the mean of its divisors is an integer number (10607102122015).

Almost surely, 2^{21214204244029} is an apocalyptic number.

It is an amenable number.

21214204244029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214204244029 is an equidigital number, since it uses as much as digits as its factorization.

21214204244029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 21214204244029 in words is "twenty-one trillion, two hundred fourteen billion, two hundred four million, two hundred forty-four thousand, twenty-nine".