21214036536403 has 2 divisors, whose sum is σ = 21214036536404. Its totient is φ = 21214036536402.

The previous prime is 21214036536401. The next prime is 21214036536449. The reversal of 21214036536403 is 30463563041212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21214036536403 - 2¹ = 21214036536401 is a prime.

Together with 21214036536401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21214036536401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607018268201 + 10607018268202.

It is an arithmetic number, because the mean of its divisors is an integer number (10607018268202).

Almost surely, 2^{21214036536403} is an apocalyptic number.

21214036536403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214036536403 is an equidigital number, since it uses as much as digits as its factorization.

21214036536403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 21214036536403 its reverse (30463563041212), we get a palindrome (51677599577615).

The spelling of 21214036536403 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, four hundred three".