111120000220021 has 4 divisors (see below), whose sum is σ = 119667692544652. Its totient is φ = 102572307895392.

The previous prime is 111120000220013. The next prime is 111120000220153. The reversal of 111120000220021 is 120022000021111.

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 49370437488100 + 61749562731921 = 7026410^2 + 7858089^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120000220021 - 2³ = 111120000220013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 8547692324617 = 111120000220021 / (1 + 1 + 1 + 1 + 2 + 0 + 0 + 0 + 0 + 2 + 2 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111120000219983 and 111120000220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111120000220721) 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, 4273846162296 + ... + 4273846162321.

It is an arithmetic number, because the mean of its divisors is an integer number (29916923136163).

Almost surely, 2^{111120000220021} is an apocalyptic number.

It is an amenable number.

111120000220021 is a deficient number, since it is larger than the sum of its proper divisors (8547692324631).

111120000220021 is an equidigital number, since it uses as much as digits as its factorization.

111120000220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8547692324630.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111120000220021 its reverse (120022000021111), we get a palindrome (231142000241132).

The spelling of 111120000220021 in words is "one hundred eleven trillion, one hundred twenty billion, two hundred twenty thousand, twenty-one".