21020201010123 has 16 divisors (see below), whose sum is σ = 32030846639616. Its totient is φ = 12011519378880.

The previous prime is 21020201010119. The next prime is 21020201010167. The reversal of 21020201010123 is 32101010202012.

It is not a de Polignac number, because 21020201010123 - 2² = 21020201010119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21020201020123) 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 15 ways as a sum of consecutive naturals, for example, 19245378 + ... + 20308248.

It is an arithmetic number, because the mean of its divisors is an integer number (2001927914976).

Almost surely, 2^{21020201010123} is an apocalyptic number.

21020201010123 is a deficient number, since it is larger than the sum of its proper divisors (11010645629493).

21020201010123 is a wasteful number, since it uses less digits than its factorization.

21020201010123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004634.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21020201010123 its reverse (32101010202012), we get a palindrome (53121211212135).

The spelling of 21020201010123 in words is "twenty-one trillion, twenty billion, two hundred one million, ten thousand, one hundred twenty-three".