111020001121 has 4 divisors (see below), whose sum is σ = 111020682244. Its totient is φ = 111019320000.

The previous prime is 111020001119. The next prime is 111020001137. The reversal of 111020001121 is 121100020111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18214471521 + 92805529600 = 134961^2 + 304640^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020001121 - 2¹ = 111020001119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020001098 and 111020001107.

It is not an unprimeable number, because it can be changed into a prime (111020011121) 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, 64621 + ... + 475621.

It is an arithmetic number, because the mean of its divisors is an integer number (27755170561).

Almost surely, 2^111020001121 is an apocalyptic number.

It is an amenable number.

111020001121 is a deficient number, since it is larger than the sum of its proper divisors (681123).

111020001121 is an equidigital number, since it uses as much as digits as its factorization.

111020001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681122.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111020001121 its reverse (121100020111), we get a palindrome (232120021232).

The spelling of 111020001121 in words is "one hundred eleven billion, twenty million, one thousand, one hundred twenty-one".