121020221109 has 8 divisors (see below), whose sum is σ = 162926900032. Its totient is φ = 79896844800.

The previous prime is 121020221053. The next prime is 121020221141. The reversal of 121020221109 is 901122020121.

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

It is not a de Polignac number, because 121020221109 - 2¹⁹ = 121019696821 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 (121020221009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195825292 + ... + 195825909.

It is an arithmetic number, because the mean of its divisors is an integer number (20365862504).

Almost surely, 2^121020221109 is an apocalyptic number.

It is an amenable number.

121020221109 is a deficient number, since it is larger than the sum of its proper divisors (41906678923).

121020221109 is a wasteful number, since it uses less digits than its factorization.

121020221109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391651307.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 121020221109 in words is "one hundred twenty-one billion, twenty million, two hundred twenty-one thousand, one hundred nine".