121011221201111 has 8 divisors (see below), whose sum is σ = 124984711002624. Its totient is φ = 117042100275960.

The previous prime is 121011221201083. The next prime is 121011221201147. The reversal of 121011221201111 is 111102122110121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121011221201111 - 2³⁰ = 121010147459287 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 121011221201111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011221501111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092162785 + ... + 1092273578.

It is an arithmetic number, because the mean of its divisors is an integer number (15623088875328).

Almost surely, 2^{121011221201111} is an apocalyptic number.

121011221201111 is a deficient number, since it is larger than the sum of its proper divisors (3973489801513).

121011221201111 is a wasteful number, since it uses less digits than its factorization.

121011221201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184438181.

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

Adding to 121011221201111 its reverse (111102122110121), we get a palindrome (232113343311232).

The spelling of 121011221201111 in words is "one hundred twenty-one trillion, eleven billion, two hundred twenty-one million, two hundred one thousand, one hundred eleven".