121441107821 has 16 divisors (see below), whose sum is σ = 139335095808. Its totient is φ = 104823825600.

The previous prime is 121441107793. The next prime is 121441107829. The reversal of 121441107821 is 128701144121.

It is a cyclic number.

It is not a de Polignac number, because 121441107821 - 2⁶ = 121441107757 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 (121441107829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3341666 + ... + 3377811.

It is an arithmetic number, because the mean of its divisors is an integer number (8708443488).

Almost surely, 2^121441107821 is an apocalyptic number.

121441107821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121441107821 is a deficient number, since it is larger than the sum of its proper divisors (17893987987).

121441107821 is a wasteful number, since it uses less digits than its factorization.

121441107821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6719572.

The product of its (nonzero) digits is 3584, while the sum is 32.

The spelling of 121441107821 in words is "one hundred twenty-one billion, four hundred forty-one million, one hundred seven thousand, eight hundred twenty-one".