21132111019 has 4 divisors (see below), whose sum is σ = 21141140320. Its totient is φ = 21123081720.

The previous prime is 21132110999. The next prime is 21132111023. The reversal of 21132111019 is 91011123112.

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 21132111019 - 2⁹ = 21132110507 is a prime.

It is a super-2 number, since 2×21132111019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132114019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4511139 + ... + 4515820.

It is an arithmetic number, because the mean of its divisors is an integer number (5285285080).

Almost surely, 2^21132111019 is an apocalyptic number.

21132111019 is a deficient number, since it is larger than the sum of its proper divisors (9029301).

21132111019 is an equidigital number, since it uses as much as digits as its factorization.

21132111019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9029300.

The product of its (nonzero) digits is 108, while the sum is 22.

The spelling of 21132111019 in words is "twenty-one billion, one hundred thirty-two million, one hundred eleven thousand, nineteen".