21003231302101 has 4 divisors (see below), whose sum is σ = 21008051878252. Its totient is φ = 20998410725952.

The previous prime is 21003231302099. The next prime is 21003231302147. The reversal of 21003231302101 is 10120313230012.

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 20436412042225 + 566819259876 = 4520665^2 + 752874^2 .

It is a cyclic number.

It is not a de Polignac number, because 21003231302101 - 2¹ = 21003231302099 is a prime.

It is a super-2 number, since 2×21003231302101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003231102101) 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, 2410281540 + ... + 2410290253.

It is an arithmetic number, because the mean of its divisors is an integer number (5252012969563).

Almost surely, 2^{21003231302101} is an apocalyptic number.

It is an amenable number.

21003231302101 is a deficient number, since it is larger than the sum of its proper divisors (4820576151).

21003231302101 is an equidigital number, since it uses as much as digits as its factorization.

21003231302101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820576150.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21003231302101 its reverse (10120313230012), we get a palindrome (31123544532113).

The spelling of 21003231302101 in words is "twenty-one trillion, three billion, two hundred thirty-one million, three hundred two thousand, one hundred one".