112001221011221 has 4 divisors (see below), whose sum is σ = 112001266903212. Its totient is φ = 112001175119232.

The previous prime is 112001221011139. The next prime is 112001221011233. The reversal of 112001221011221 is 122110122100211.

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 57255872031121 + 54745348980100 = 7566761^2 + 7399010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112001221011221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 112001221011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112001221016221) 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, 19066556 + ... + 24239141.

It is an arithmetic number, because the mean of its divisors is an integer number (28000316725803).

Almost surely, 2^{112001221011221} is an apocalyptic number.

It is an amenable number.

112001221011221 is a deficient number, since it is larger than the sum of its proper divisors (45891991).

112001221011221 is an equidigital number, since it uses as much as digits as its factorization.

112001221011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45891990.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 112001221011221 its reverse (122110122100211), we get a palindrome (234111343111432).

The spelling of 112001221011221 in words is "one hundred twelve trillion, one billion, two hundred twenty-one million, eleven thousand, two hundred twenty-one".