120000121000021 has 4 divisors (see below), whose sum is σ = 121967336098444. Its totient is φ = 118032905901600.

The previous prime is 120000120999977. The next prime is 120000121000093.

120000121000021 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1478011590225 + 118522109409796 = 1215735^2 + 10886786^2 .

It is a cyclic number.

It is not a de Polignac number, because 120000121000021 - 2²⁹ = 119999584129109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120000120999971 and 120000121000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000121000121) 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 3 ways as a sum of consecutive naturals, for example, 983607549120 + ... + 983607549241.

It is an arithmetic number, because the mean of its divisors is an integer number (30491834024611).

Almost surely, 2^{120000121000021} is an apocalyptic number.

It is an amenable number.

120000121000021 is a deficient number, since it is larger than the sum of its proper divisors (1967215098423).

120000121000021 is an equidigital number, since it uses as much as digits as its factorization.

120000121000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967215098422.

The product of its (nonzero) digits is 8, while the sum is 10.

The spelling of 120000121000021 in words is "one hundred twenty trillion, one hundred twenty-one million, twenty-one", and thus it is an aban number.