21011014535453 has 4 divisors (see below), whose sum is σ = 22116857405760. Its totient is φ = 19905171665148.

The previous prime is 21011014535447. The next prime is 21011014535503. The reversal of 21011014535453 is 35453541011012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21011014535453 - 2⁴⁰ = 19911502907677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011014535153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552921435125 + ... + 552921435162.

It is an arithmetic number, because the mean of its divisors is an integer number (5529214351440).

Almost surely, 2^{21011014535453} is an apocalyptic number.

It is an amenable number.

21011014535453 is a deficient number, since it is larger than the sum of its proper divisors (1105842870307).

21011014535453 is a wasteful number, since it uses less digits than its factorization.

21011014535453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105842870306.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 21011014535453 its reverse (35453541011012), we get a palindrome (56464555546465).

The spelling of 21011014535453 in words is "twenty-one trillion, eleven billion, fourteen million, five hundred thirty-five thousand, four hundred fifty-three".