21110201029 has 2 divisors, whose sum is σ = 21110201030. Its totient is φ = 21110201028.

The previous prime is 21110201017. The next prime is 21110201033. The reversal of 21110201029 is 92010201112.

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., 10842432129 + 10267768900 = 104127^2 + 101330^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110201029 - 2¹⁹ = 21109676741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21110200997 and 21110201015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110201089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555100514 + 10555100515.

It is an arithmetic number, because the mean of its divisors is an integer number (10555100515).

Almost surely, 2^21110201029 is an apocalyptic number.

It is an amenable number.

21110201029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110201029 is an equidigital number, since it uses as much as digits as its factorization.

21110201029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 21110201029 in words is "twenty-one billion, one hundred ten million, two hundred one thousand, twenty-nine".