121020021120021 has 8 divisors (see below), whose sum is σ = 161362225233120. Its totient is φ = 80678915543472.

The previous prime is 121020021120013. The next prime is 121020021120059. The reversal of 121020021120021 is 120021120020121.

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

It is not a de Polignac number, because 121020021120021 - 2³ = 121020021120013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020021120221) 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, 274377051 + ... + 274817768.

It is an arithmetic number, because the mean of its divisors is an integer number (20170278154140).

Almost surely, 2^{121020021120021} is an apocalyptic number.

It is an amenable number.

121020021120021 is a deficient number, since it is larger than the sum of its proper divisors (40342204113099).

121020021120021 is an equidigital number, since it uses as much as digits as its factorization.

121020021120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549268275.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121020021120021 its reverse (120021120020121), we get a palindrome (241041141140142).

The spelling of 121020021120021 in words is "one hundred twenty-one trillion, twenty billion, twenty-one million, one hundred twenty thousand, twenty-one".