21300313131 has 12 divisors (see below), whose sum is σ = 30768945480. Its totient is φ = 14199365760.

The previous prime is 21300313091. The next prime is 21300313193. The reversal of 21300313131 is 13131300312.

It is a happy number.

21300313131 is a `hidden beast` number, since 21 + 300 + 31 + 313 + 1 = 666.

It is not a de Polignac number, because 21300313131 - 2¹⁸ = 21300050987 is a prime.

It is a super-2 number, since 2×21300313131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21300313231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115675 + ... + 236603.

It is an arithmetic number, because the mean of its divisors is an integer number (2564078790).

Almost surely, 2^21300313131 is an apocalyptic number.

21300313131 is a deficient number, since it is larger than the sum of its proper divisors (9468632349).

21300313131 is a wasteful number, since it uses less digits than its factorization.

21300313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140506 (or 140503 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21300313131 its reverse (13131300312), we get a palindrome (34431613443).

The spelling of 21300313131 in words is "twenty-one billion, three hundred million, three hundred thirteen thousand, one hundred thirty-one".