121020121112221 has 8 divisors (see below), whose sum is σ = 122442943212864. Its totient is φ = 119603471776320.

The previous prime is 121020121112183. The next prime is 121020121112281. The reversal of 121020121112221 is 122211121020121.

It is a happy number.

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 121020121112221 - 2³³ = 121011531177629 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 (121020121112281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1543151745 + ... + 1543230166.

It is an arithmetic number, because the mean of its divisors is an integer number (15305367901608).

Almost surely, 2^{121020121112221} is an apocalyptic number.

It is an amenable number.

121020121112221 is a deficient number, since it is larger than the sum of its proper divisors (1422822100643).

121020121112221 is a wasteful number, since it uses less digits than its factorization.

121020121112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086382371.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121020121112221 its reverse (122211121020121), we get a palindrome (243231242132342).

The spelling of 121020121112221 in words is "one hundred twenty-one trillion, twenty billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".