21303021131 has 8 divisors (see below), whose sum is σ = 24356198400. Its totient is φ = 18252316008.

The previous prime is 21303021083. The next prime is 21303021133. The reversal of 21303021131 is 13112030312.

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 21303021131 - 2⁶ = 21303021067 is a prime.

It is a super-2 number, since 2×21303021131² (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 (21303021133) 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, 599531 + ... + 634068.

It is an arithmetic number, because the mean of its divisors is an integer number (3044524800).

Almost surely, 2^21303021131 is an apocalyptic number.

21303021131 is a deficient number, since it is larger than the sum of its proper divisors (3053177269).

21303021131 is a wasteful number, since it uses less digits than its factorization.

21303021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236073.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21303021131 its reverse (13112030312), we get a palindrome (34415051443).

The spelling of 21303021131 in words is "twenty-one billion, three hundred three million, twenty-one thousand, one hundred thirty-one".