21532504111211 has 8 divisors (see below), whose sum is σ = 21537825166704. Its totient is φ = 21527183370240.

The previous prime is 21532504111199. The next prime is 21532504111253. The reversal of 21532504111211 is 11211140523512.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21532504111211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21532504111271) 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, 193719731 + ... + 193830851.

It is an arithmetic number, because the mean of its divisors is an integer number (2692228145838).

Almost surely, 2^{21532504111211} is an apocalyptic number.

21532504111211 is a deficient number, since it is larger than the sum of its proper divisors (5321055493).

21532504111211 is a wasteful number, since it uses less digits than its factorization.

21532504111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157261.

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 21532504111211 its reverse (11211140523512), we get a palindrome (32743644634723).

The spelling of 21532504111211 in words is "twenty-one trillion, five hundred thirty-two billion, five hundred four million, one hundred eleven thousand, two hundred eleven".