21102132332111 has 4 divisors (see below), whose sum is σ = 21189693047424. Its totient is φ = 21014571616800.

The previous prime is 21102132332093. The next prime is 21102132332123. The reversal of 21102132332111 is 11123323120112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21102132332111 - 2¹⁰ = 21102132331087 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 (21102132332161) 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, 43780357295 + ... + 43780357776.

It is an arithmetic number, because the mean of its divisors is an integer number (5297423261856).

Almost surely, 2^{21102132332111} is an apocalyptic number.

21102132332111 is a deficient number, since it is larger than the sum of its proper divisors (87560715313).

21102132332111 is an equidigital number, since it uses as much as digits as its factorization.

21102132332111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87560715312.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21102132332111 its reverse (11123323120112), we get a palindrome (32225455452223).

The spelling of 21102132332111 in words is "twenty-one trillion, one hundred two billion, one hundred thirty-two million, three hundred thirty-two thousand, one hundred eleven".