21136016331 has 24 divisors (see below), whose sum is σ = 31187963664. Its totient is φ = 13789258560.

The previous prime is 21136016329. The next prime is 21136016353. The reversal of 21136016331 is 13361063112.

21136016331 is a `hidden beast` number, since 21 + 1 + 3 + 6 + 0 + 1 + 633 + 1 = 666.

It is not a de Polignac number, because 21136016331 - 2¹ = 21136016329 is a prime.

It is a super-2 number, since 2×21136016331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21136016295 and 21136016304.

It is not an unprimeable number, because it can be changed into a prime (21136016371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10440 + ... + 205866.

It is an arithmetic number, because the mean of its divisors is an integer number (1299498486).

Almost surely, 2^21136016331 is an apocalyptic number.

21136016331 is a deficient number, since it is larger than the sum of its proper divisors (10051947333).

21136016331 is a wasteful number, since it uses less digits than its factorization.

21136016331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195691 (or 195688 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

Adding to 21136016331 its reverse (13361063112), we get a palindrome (34497079443).

The spelling of 21136016331 in words is "twenty-one billion, one hundred thirty-six million, sixteen thousand, three hundred thirty-one".