111120220220021 has 4 divisors (see below), whose sum is σ = 116968652863200. Its totient is φ = 105271787576844.

The previous prime is 111120220220011. The next prime is 111120220220089. The reversal of 111120220220021 is 120022022021111.

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 111120220220021 - 2³⁴ = 111103040350837 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 (111120220220011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2924216321561 + ... + 2924216321598.

It is an arithmetic number, because the mean of its divisors is an integer number (29242163215800).

Almost surely, 2^{111120220220021} is an apocalyptic number.

It is an amenable number.

111120220220021 is a deficient number, since it is larger than the sum of its proper divisors (5848432643179).

111120220220021 is an equidigital number, since it uses as much as digits as its factorization.

111120220220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5848432643178.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111120220220021 its reverse (120022022021111), we get a palindrome (231142242241132).

The spelling of 111120220220021 in words is "one hundred eleven trillion, one hundred twenty billion, two hundred twenty million, two hundred twenty thousand, twenty-one".