21102340109029 has 2 divisors, whose sum is σ = 21102340109030. Its totient is φ = 21102340109028.

The previous prime is 21102340109017. The next prime is 21102340109041. The reversal of 21102340109029 is 92090104320112.

It is a balanced prime because it is at equal distance from previous prime (21102340109017) and next prime (21102340109041).

It can be written as a sum of positive squares in only one way, i.e., 20144881773025 + 957458336004 = 4488305^2 + 978498^2 .

It is a cyclic number.

It is not a de Polignac number, because 21102340109029 - 2⁹ = 21102340108517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21102340108985 and 21102340109003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102340109329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551170054514 + 10551170054515.

It is an arithmetic number, because the mean of its divisors is an integer number (10551170054515).

Almost surely, 2^{21102340109029} is an apocalyptic number.

It is an amenable number.

21102340109029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102340109029 is an equidigital number, since it uses as much as digits as its factorization.

21102340109029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 21102340109029 in words is "twenty-one trillion, one hundred two billion, three hundred forty million, one hundred nine thousand, twenty-nine".