21030113131 has 8 divisors (see below), whose sum is σ = 21290212944. Its totient is φ = 20770173600.

The previous prime is 21030113123. The next prime is 21030113141. The reversal of 21030113131 is 13131103012.

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

It is a cyclic number.

It is not a de Polignac number, because 21030113131 - 2³ = 21030113123 is a prime.

It is a super-2 number, since 2×21030113131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030113141) 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, 235605 + ... + 312361.

It is an arithmetic number, because the mean of its divisors is an integer number (2661276618).

Almost surely, 2^21030113131 is an apocalyptic number.

21030113131 is a deficient number, since it is larger than the sum of its proper divisors (260099813).

21030113131 is an equidigital number, since it uses as much as digits as its factorization.

21030113131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80141.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21030113131 its reverse (13131103012), we get a palindrome (34161216143).

The spelling of 21030113131 in words is "twenty-one billion, thirty million, one hundred thirteen thousand, one hundred thirty-one".