21303310213131 has 4 divisors (see below), whose sum is σ = 28404413617512. Its totient is φ = 14202206808752.

The previous prime is 21303310213111. The next prime is 21303310213151. The reversal of 21303310213131 is 13131201330312.

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

It is an interprime number because it is at equal distance from previous prime (21303310213111) and next prime (21303310213151).

It is a cyclic number.

It is not a de Polignac number, because 21303310213131 - 2¹¹ = 21303310211083 is a prime.

It is a super-2 number, since 2×21303310213131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21303310213111) 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, 3550551702186 + ... + 3550551702191.

It is an arithmetic number, because the mean of its divisors is an integer number (7101103404378).

Almost surely, 2^{21303310213131} is an apocalyptic number.

21303310213131 is a deficient number, since it is larger than the sum of its proper divisors (7101103404381).

21303310213131 is an equidigital number, since it uses as much as digits as its factorization.

21303310213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101103404380.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21303310213131 its reverse (13131201330312), we get a palindrome (34434511543443).

The spelling of 21303310213131 in words is "twenty-one trillion, three hundred three billion, three hundred ten million, two hundred thirteen thousand, one hundred thirty-one".