21112132013111 has 4 divisors (see below), whose sum is σ = 21112142735472. Its totient is φ = 21112121290752.

The previous prime is 21112132013069. The next prime is 21112132013183. The reversal of 21112132013111 is 11131023121112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21112132013111 - 2⁶ = 21112132013047 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 (21112132013311) 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, 1462811 + ... + 6660636.

It is an arithmetic number, because the mean of its divisors is an integer number (5278035683868).

Almost surely, 2^{21112132013111} is an apocalyptic number.

21112132013111 is a deficient number, since it is larger than the sum of its proper divisors (10722361).

21112132013111 is an equidigital number, since it uses as much as digits as its factorization.

21112132013111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722360.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 21112132013111 its reverse (11131023121112), we get a palindrome (32243155134223).

The spelling of 21112132013111 in words is "twenty-one trillion, one hundred twelve billion, one hundred thirty-two million, thirteen thousand, one hundred eleven".