112101223131221 has 4 divisors (see below), whose sum is σ = 113256905844012. Its totient is φ = 110945540418432.

The previous prime is 112101223131103. The next prime is 112101223131319. The reversal of 112101223131221 is 122131322101211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54856034868196 + 57245188263025 = 7406486^2 + 7566055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112101223131221 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 (112101223137221) 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, 577841356250 + ... + 577841356443.

It is an arithmetic number, because the mean of its divisors is an integer number (28314226461003).

Almost surely, 2^{112101223131221} is an apocalyptic number.

It is an amenable number.

112101223131221 is a deficient number, since it is larger than the sum of its proper divisors (1155682712791).

112101223131221 is an equidigital number, since it uses as much as digits as its factorization.

112101223131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155682712790.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 112101223131221 its reverse (122131322101211), we get a palindrome (234232545232432).

The spelling of 112101223131221 in words is "one hundred twelve trillion, one hundred one billion, two hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-one".