121111001101 has 4 divisors (see below), whose sum is σ = 121745090304. Its totient is φ = 120476911900.

The previous prime is 121111001071. The next prime is 121111001107. The reversal of 121111001101 is 101100111121.

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 121111001101 - 2⁵ = 121111001069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111001107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317044315 + ... + 317044696.

It is an arithmetic number, because the mean of its divisors is an integer number (30436272576).

Almost surely, 2^121111001101 is an apocalyptic number.

It is an amenable number.

121111001101 is a deficient number, since it is larger than the sum of its proper divisors (634089203).

121111001101 is an equidigital number, since it uses as much as digits as its factorization.

121111001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634089202.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 121111001101 its reverse (101100111121), we get a palindrome (222211112222).

The spelling of 121111001101 in words is "one hundred twenty-one billion, one hundred eleven million, one thousand, one hundred one".