121120210120021 has 8 divisors (see below), whose sum is σ = 142164262071680. Its totient is φ = 101011449366288.

The previous prime is 121120210119989. The next prime is 121120210120033. The reversal of 121120210120021 is 120021012021121.

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 121120210120021 - 2⁵ = 121120210119989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121120210119977 and 121120210120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120210720021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233822799201 + ... + 233822799718.

It is an arithmetic number, because the mean of its divisors is an integer number (17770532758960).

Almost surely, 2^{121120210120021} is an apocalyptic number.

It is an amenable number.

121120210120021 is a deficient number, since it is larger than the sum of its proper divisors (21044051951659).

121120210120021 is an equidigital number, since it uses as much as digits as its factorization.

121120210120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467645598963.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121120210120021 its reverse (120021012021121), we get a palindrome (241141222141142).

The spelling of 121120210120021 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred ten million, one hundred twenty thousand, twenty-one".