21532531101 has 8 divisors (see below), whose sum is σ = 28715777280. Its totient is φ = 14352152832.

The previous prime is 21532531057. The next prime is 21532531121. The reversal of 21532531101 is 10113523512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21532531101 - 2⁶ = 21532531037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21532531121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699396 + ... + 729533.

It is an arithmetic number, because the mean of its divisors is an integer number (3589472160).

Almost surely, 2^21532531101 is an apocalyptic number.

It is an amenable number.

21532531101 is a deficient number, since it is larger than the sum of its proper divisors (7183246179).

21532531101 is a wasteful number, since it uses less digits than its factorization.

21532531101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433955.

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 21532531101 in words is "twenty-one billion, five hundred thirty-two million, five hundred thirty-one thousand, one hundred one".