21300302331 has 24 divisors (see below), whose sum is σ = 38358987264. Its totient is φ = 11065091760.

The previous prime is 21300302311. The next prime is 21300302347. The reversal of 21300302331 is 13320300312.

21300302331 is a `hidden beast` number, since 2 + 1 + 30 + 0 + 302 + 331 = 666.

It is not a de Polignac number, because 21300302331 - 2⁶ = 21300302267 is a prime.

It is a super-2 number, since 2×21300302331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21300302311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15367491 + ... + 15368876.

It is an arithmetic number, because the mean of its divisors is an integer number (1598291136).

Almost surely, 2^21300302331 is an apocalyptic number.

21300302331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21300302331 is a deficient number, since it is larger than the sum of its proper divisors (17058684933).

21300302331 is a wasteful number, since it uses less digits than its factorization.

21300302331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30736391 (or 30736388 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21300302331 its reverse (13320300312), we get a palindrome (34620602643).

The spelling of 21300302331 in words is "twenty-one billion, three hundred million, three hundred two thousand, three hundred thirty-one".