21035541054401 has 4 divisors (see below), whose sum is σ = 21038841789012. Its totient is φ = 21032240319792.

The previous prime is 21035541054371. The next prime is 21035541054403. The reversal of 21035541054401 is 10445014553012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19773816794176 + 1261724260225 = 4446776^2 + 1123265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21035541054401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21035541054403) 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, 1650357746 + ... + 1650370491.

It is an arithmetic number, because the mean of its divisors is an integer number (5259710447253).

Almost surely, 2^{21035541054401} is an apocalyptic number.

It is an amenable number.

21035541054401 is a deficient number, since it is larger than the sum of its proper divisors (3300734611).

21035541054401 is an equidigital number, since it uses as much as digits as its factorization.

21035541054401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300734610.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 21035541054401 in words is "twenty-one trillion, thirty-five billion, five hundred forty-one million, fifty-four thousand, four hundred one".