21214036533671 has 2 divisors, whose sum is σ = 21214036533672. Its totient is φ = 21214036533670.

The previous prime is 21214036533667. The next prime is 21214036533719. The reversal of 21214036533671 is 17633563041212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21214036533671 - 2² = 21214036533667 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214036533271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607018266835 + 10607018266836.

It is an arithmetic number, because the mean of its divisors is an integer number (10607018266836).

Almost surely, 2^{21214036533671} is an apocalyptic number.

21214036533671 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214036533671 is an equidigital number, since it uses as much as digits as its factorization.

21214036533671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 44.

Adding to 21214036533671 its reverse (17633563041212), we get a palindrome (38847599574883).

The spelling of 21214036533671 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-three thousand, six hundred seventy-one".