21136016371 has 2 divisors, whose sum is σ = 21136016372. Its totient is φ = 21136016370.

The previous prime is 21136016353. The next prime is 21136016381. The reversal of 21136016371 is 17361063112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21136016371 - 2³¹ = 18988532723 is a prime.

It is not a weakly prime, because it can be changed into another prime (21136016381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10568008185 + 10568008186.

It is an arithmetic number, because the mean of its divisors is an integer number (10568008186).

Almost surely, 2^21136016371 is an apocalyptic number.

21136016371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21136016371 is an equidigital number, since it uses as much as digits as its factorization.

21136016371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

Adding to 21136016371 its reverse (17361063112), we get a palindrome (38497079483).

The spelling of 21136016371 in words is "twenty-one billion, one hundred thirty-six million, sixteen thousand, three hundred seventy-one".