21110111132113 has 4 divisors (see below), whose sum is σ = 21407436641088. Its totient is φ = 20812785623140.

The previous prime is 21110111132093. The next prime is 21110111132153. The reversal of 21110111132113 is 31123111101112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21110111132113 - 2⁴¹ = 18911087876561 is a prime.

It is a super-2 number, since 2×21110111132113² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21110111132153) 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, 148662754381 + ... + 148662754522.

It is an arithmetic number, because the mean of its divisors is an integer number (5351859160272).

Almost surely, 2^{21110111132113} is an apocalyptic number.

It is an amenable number.

21110111132113 is a deficient number, since it is larger than the sum of its proper divisors (297325508975).

21110111132113 is an equidigital number, since it uses as much as digits as its factorization.

21110111132113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297325508974.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 21110111132113 its reverse (31123111101112), we get a palindrome (52233222233225).

The spelling of 21110111132113 in words is "twenty-one trillion, one hundred ten billion, one hundred eleven million, one hundred thirty-two thousand, one hundred thirteen".