111220020120001 has 24 divisors (see below), whose sum is σ = 123373093316256. Its totient is φ = 100158850546560.

The previous prime is 111220020119981. The next prime is 111220020120037. The reversal of 111220020120001 is 100021020022111.

It is not a de Polignac number, because 111220020120001 - 2¹¹ = 111220020117953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111220020120061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 542320386 + ... + 542525428.

It is an arithmetic number, because the mean of its divisors is an integer number (5140545554844).

Almost surely, 2^{111220020120001} is an apocalyptic number.

It is an amenable number.

111220020120001 is a deficient number, since it is larger than the sum of its proper divisors (12153073196255).

111220020120001 is a wasteful number, since it uses less digits than its factorization.

111220020120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283393 (or 283380 counting only the distinct ones).

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

Adding to 111220020120001 its reverse (100021020022111), we get a palindrome (211241040142112).

The spelling of 111220020120001 in words is "one hundred eleven trillion, two hundred twenty billion, twenty million, one hundred twenty thousand, one".