111120121210001 has 4 divisors (see below), whose sum is σ = 112220320430004. Its totient is φ = 110019921990000.

The previous prime is 111120121209991. The next prime is 111120121210003. The reversal of 111120121210001 is 100012121021111.

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 97009399942225 + 14110721267776 = 9849335^2 + 3756424^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120121210001 - 2¹⁰ = 111120121208977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111120121210003) 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, 550099609850 + ... + 550099610051.

It is an arithmetic number, because the mean of its divisors is an integer number (28055080107501).

Almost surely, 2^{111120121210001} is an apocalyptic number.

It is an amenable number.

111120121210001 is a deficient number, since it is larger than the sum of its proper divisors (1100199220003).

111120121210001 is a wasteful number, since it uses less digits than its factorization.

111120121210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100199220002.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111120121210001 its reverse (100012121021111), we get a palindrome (211132242231112).

The spelling of 111120121210001 in words is "one hundred eleven trillion, one hundred twenty billion, one hundred twenty-one million, two hundred ten thousand, one".