21010122010303 has 4 divisors (see below), whose sum is σ = 21218143020408. Its totient is φ = 20802101000200.

The previous prime is 21010122010247. The next prime is 21010122010307. The reversal of 21010122010303 is 30301022101012.

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

It is a cyclic number.

It is not a de Polignac number, because 21010122010303 - 2⁹ = 21010122009791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010122010307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104010504901 + ... + 104010505102.

It is an arithmetic number, because the mean of its divisors is an integer number (5304535755102).

Almost surely, 2^{21010122010303} is an apocalyptic number.

21010122010303 is a deficient number, since it is larger than the sum of its proper divisors (208021010105).

21010122010303 is a wasteful number, since it uses less digits than its factorization.

21010122010303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208021010104.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21010122010303 its reverse (30301022101012), we get a palindrome (51311144111315).

The spelling of 21010122010303 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, ten thousand, three hundred three".