111010012121 has 6 divisors (see below), whose sum is σ = 117924130830. Its totient is φ = 104480011136.

The previous prime is 111010012117. The next prime is 111010012153. The reversal of 111010012121 is 121210010111.

It can be written as a sum of positive squares in 3 ways, for example, as 84558242521 + 26451769600 = 290789^2 + 162640^2 .

It is not a de Polignac number, because 111010012121 - 2² = 111010012117 is a prime.

It is a super-3 number, since 3×111010012121³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111010012621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 192058556 + ... + 192059133.

It is an arithmetic number, because the mean of its divisors is an integer number (19654021805).

Almost surely, 2^111010012121 is an apocalyptic number.

It is an amenable number.

111010012121 is a deficient number, since it is larger than the sum of its proper divisors (6914118709).

111010012121 is an equidigital number, since it uses as much as digits as its factorization.

111010012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384117723 (or 384117706 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111010012121 its reverse (121210010111), we get a palindrome (232220022232).

The spelling of 111010012121 in words is "one hundred eleven billion, ten million, twelve thousand, one hundred twenty-one".