111020321132221 has 4 divisors (see below), whose sum is σ = 111028407701500. Its totient is φ = 111012234562944.

The previous prime is 111020321132209. The next prime is 111020321132249. The reversal of 111020321132221 is 122231123020111.

It is a happy number.

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 24074281968025 + 86946039164196 = 4906555^2 + 9324486^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020321132221 - 2⁴³ = 102224228110013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020321132192 and 111020321132201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020321132261) 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, 4043264046 + ... + 4043291503.

It is an arithmetic number, because the mean of its divisors is an integer number (27757101925375).

Almost surely, 2^{111020321132221} is an apocalyptic number.

It is an amenable number.

111020321132221 is a deficient number, since it is larger than the sum of its proper divisors (8086569279).

111020321132221 is an equidigital number, since it uses as much as digits as its factorization.

111020321132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8086569278.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 111020321132221 its reverse (122231123020111), we get a palindrome (233251444152332).

The spelling of 111020321132221 in words is "one hundred eleven trillion, twenty billion, three hundred twenty-one million, one hundred thirty-two thousand, two hundred twenty-one".