121020110221 has 16 divisors (see below), whose sum is σ = 132789983040. Its totient is φ = 109780796160.

The previous prime is 121020110219. The next prime is 121020110227. The reversal of 121020110221 is 122011020121.

It is a cyclic number.

It is not a de Polignac number, because 121020110221 - 2¹ = 121020110219 is a prime.

It is a super-3 number, since 3×121020110221³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020110227) 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 15 ways as a sum of consecutive naturals, for example, 66550 + ... + 496456.

It is an arithmetic number, because the mean of its divisors is an integer number (8299373940).

Almost surely, 2^121020110221 is an apocalyptic number.

It is an amenable number.

121020110221 is a deficient number, since it is larger than the sum of its proper divisors (11769872819).

121020110221 is a wasteful number, since it uses less digits than its factorization.

121020110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430524.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121020110221 its reverse (122011020121), we get a palindrome (243031130342).

The spelling of 121020110221 in words is "one hundred twenty-one billion, twenty million, one hundred ten thousand, two hundred twenty-one".