21010123301129 has 4 divisors (see below), whose sum is σ = 21202876726020. Its totient is φ = 20817369876240.

The previous prime is 21010123301071. The next prime is 21010123301159. The reversal of 21010123301129 is 92110332101012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6440672471104 + 14569450830025 = 2537848^2 + 3816995^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010123301129 - 2¹⁶ = 21010123235593 is a prime.

It is a super-2 number, since 2×21010123301129² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010123301098 and 21010123301107.

It is not an unprimeable number, because it can be changed into a prime (21010123301159) 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 in 3 ways as a sum of consecutive naturals, for example, 96376712282 + ... + 96376712499.

It is an arithmetic number, because the mean of its divisors is an integer number (5300719181505).

Almost surely, 2^{21010123301129} is an apocalyptic number.

It is an amenable number.

21010123301129 is a deficient number, since it is larger than the sum of its proper divisors (192753424891).

21010123301129 is a wasteful number, since it uses less digits than its factorization.

21010123301129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192753424890.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 21010123301129 in words is "twenty-one trillion, ten billion, one hundred twenty-three million, three hundred one thousand, one hundred twenty-nine".