21216403303483 has 2 divisors, whose sum is σ = 21216403303484. Its totient is φ = 21216403303482.

The previous prime is 21216403303409. The next prime is 21216403303499. The reversal of 21216403303483 is 38430330461212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21216403303483 - 2²⁹ = 21215866432571 is a prime.

It is not a weakly prime, because it can be changed into another prime (21216403309483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10608201651741 + 10608201651742.

It is an arithmetic number, because the mean of its divisors is an integer number (10608201651742).

Almost surely, 2^{21216403303483} is an apocalyptic number.

21216403303483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21216403303483 is an equidigital number, since it uses as much as digits as its factorization.

21216403303483 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 40.

Adding to 21216403303483 its reverse (38430330461212), we get a palindrome (59646733764695).

The spelling of 21216403303483 in words is "twenty-one trillion, two hundred sixteen billion, four hundred three million, three hundred three thousand, four hundred eighty-three".