21010101130321 has 4 divisors (see below), whose sum is σ = 21032287088112. Its totient is φ = 20987915172532.

The previous prime is 21010101130309. The next prime is 21010101130331. The reversal of 21010101130321 is 12303110101012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21010101130321 - 2¹⁷ = 21010100999249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010101130295 and 21010101130304.

It is not an unprimeable number, because it can be changed into a prime (21010101130331) 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, 11092977475 + ... + 11092979368.

It is an arithmetic number, because the mean of its divisors is an integer number (5258071772028).

Almost surely, 2^{21010101130321} is an apocalyptic number.

It is an amenable number.

21010101130321 is a deficient number, since it is larger than the sum of its proper divisors (22185957791).

21010101130321 is an equidigital number, since it uses as much as digits as its factorization.

21010101130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22185957790.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21010101130321 its reverse (12303110101012), we get a palindrome (33313211231333).

The spelling of 21010101130321 in words is "twenty-one trillion, ten billion, one hundred one million, one hundred thirty thousand, three hundred twenty-one".