111012121221101 has 4 divisors (see below), whose sum is σ = 111012889206492. Its totient is φ = 111011353235712.

The previous prime is 111012121221091. The next prime is 111012121221103. The reversal of 111012121221101 is 101122121210111.

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 57328672264900 + 53683448956201 = 7571570^2 + 7326899^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012121221101 - 2²⁶ = 111012054112237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111012121221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012121221103) 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, 383775830 + ... + 384064983.

It is an arithmetic number, because the mean of its divisors is an integer number (27753222301623).

Almost surely, 2^{111012121221101} is an apocalyptic number.

It is an amenable number.

111012121221101 is a deficient number, since it is larger than the sum of its proper divisors (767985391).

111012121221101 is an equidigital number, since it uses as much as digits as its factorization.

111012121221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767985390.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111012121221101 its reverse (101122121210111), we get a palindrome (212134242431212).

The spelling of 111012121221101 in words is "one hundred eleven trillion, twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred one".