111101022121001 has 4 divisors (see below), whose sum is σ = 121201115041104. Its totient is φ = 101000929200900.

The previous prime is 111101022120931. The next prime is 111101022121079. The reversal of 111101022121001 is 100121220101111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111101022121001 - 2¹⁰ = 111101022119977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111101022121301) 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 3 ways as a sum of consecutive naturals, for example, 5050046460035 + ... + 5050046460056.

It is an arithmetic number, because the mean of its divisors is an integer number (30300278760276).

Almost surely, 2^{111101022121001} is an apocalyptic number.

111101022121001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111101022121001 is a deficient number, since it is larger than the sum of its proper divisors (10100092920103).

111101022121001 is a wasteful number, since it uses less digits than its factorization.

111101022121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100092920102.

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

Adding to 111101022121001 its reverse (100121220101111), we get a palindrome (211222242222112).

The spelling of 111101022121001 in words is "one hundred eleven trillion, one hundred one billion, twenty-two million, one hundred twenty-one thousand, one".