112111211021 has 4 divisors (see below), whose sum is σ = 114845630844. Its totient is φ = 109376791200.

The previous prime is 112111210997. The next prime is 112111211033. The reversal of 112111211021 is 120112111211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120112111211 = 191 ⋅628859221.

It can be written as a sum of positive squares in 2 ways, for example, as 51107644900 + 61003566121 = 226070^2 + 246989^2 .

It is a cyclic number.

It is not a de Polignac number, because 112111211021 - 2¹⁸ = 112110948877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112111210987 and 112111211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112111211221) 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, 1367209850 + ... + 1367209931.

It is an arithmetic number, because the mean of its divisors is an integer number (28711407711).

Almost surely, 2^112111211021 is an apocalyptic number.

It is an amenable number.

112111211021 is a deficient number, since it is larger than the sum of its proper divisors (2734419823).

112111211021 is an equidigital number, since it uses as much as digits as its factorization.

112111211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734419822.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 112111211021 its reverse (120112111211), we get a palindrome (232223322232).

The spelling of 112111211021 in words is "one hundred twelve billion, one hundred eleven million, two hundred eleven thousand, twenty-one".