21120132111 has 16 divisors (see below), whose sum is σ = 30971587584. Its totient is φ = 12720471264.

The previous prime is 21120132107. The next prime is 21120132113. The reversal of 21120132111 is 11123102112.

It is not a de Polignac number, because 21120132111 - 2² = 21120132107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120132113) 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 15 ways as a sum of consecutive naturals, for example, 5759251 + ... + 5762916.

It is an arithmetic number, because the mean of its divisors is an integer number (1935724224).

Almost surely, 2^21120132111 is an apocalyptic number.

21120132111 is a deficient number, since it is larger than the sum of its proper divisors (9851455473).

21120132111 is a wasteful number, since it uses less digits than its factorization.

21120132111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11522230.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21120132111 its reverse (11123102112), we get a palindrome (32243234223).

The spelling of 21120132111 in words is "twenty-one billion, one hundred twenty million, one hundred thirty-two thousand, one hundred eleven".