21532205057101 has 4 divisors (see below), whose sum is σ = 21553089835104. Its totient is φ = 21511320279100.

The previous prime is 21532205057063. The next prime is 21532205057107. The reversal of 21532205057101 is 10175050223512.

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 21532205057101 - 2⁹ = 21532205056589 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 (21532205057107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10442387455 + ... + 10442389516.

It is an arithmetic number, because the mean of its divisors is an integer number (5388272458776).

Almost surely, 2^{21532205057101} is an apocalyptic number.

It is an amenable number.

21532205057101 is a deficient number, since it is larger than the sum of its proper divisors (20884778003).

21532205057101 is a wasteful number, since it uses less digits than its factorization.

21532205057101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20884778002.

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 21532205057101 in words is "twenty-one trillion, five hundred thirty-two billion, two hundred five million, fifty-seven thousand, one hundred one".