21321110203131 has 8 divisors (see below), whose sum is σ = 28434166043200. Its totient is φ = 14211063915912.

The previous prime is 21321110203109. The next prime is 21321110203147. The reversal of 21321110203131 is 13130201112312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21321110203131 - 2⁶ = 21321110203067 is a prime.

It is a super-2 number, since 2×21321110203131² (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 = 21321110203098 and 21321110203107.

It is not an unprimeable number, because it can be changed into a prime (21321110703131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752371681 + ... + 752400018.

It is an arithmetic number, because the mean of its divisors is an integer number (3554270755400).

Almost surely, 2^{21321110203131} is an apocalyptic number.

21321110203131 is a deficient number, since it is larger than the sum of its proper divisors (7113055840069).

21321110203131 is a wasteful number, since it uses less digits than its factorization.

21321110203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504776425.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21321110203131 its reverse (13130201112312), we get a palindrome (34451311315443).

The spelling of 21321110203131 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred ten million, two hundred three thousand, one hundred thirty-one".