21354153103441 has 4 divisors (see below), whose sum is σ = 21383526079552. Its totient is φ = 21324780127332.

The previous prime is 21354153103429. The next prime is 21354153103477. The reversal of 21354153103441 is 14430135145312.

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 21354153103441 - 2⁷ = 21354153103313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21354153103441.

It is not an unprimeable number, because it can be changed into a prime (21354153103411) 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, 14686486965 + ... + 14686488418.

It is an arithmetic number, because the mean of its divisors is an integer number (5345881519888).

Almost surely, 2^{21354153103441} is an apocalyptic number.

It is an amenable number.

21354153103441 is a deficient number, since it is larger than the sum of its proper divisors (29372976111).

21354153103441 is an equidigital number, since it uses as much as digits as its factorization.

21354153103441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29372976110.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 21354153103441 its reverse (14430135145312), we get a palindrome (35784288248753).

The spelling of 21354153103441 in words is "twenty-one trillion, three hundred fifty-four billion, one hundred fifty-three million, one hundred three thousand, four hundred forty-one".