120012121210021 has 4 divisors (see below), whose sum is σ = 120024242432044. Its totient is φ = 119999999988000.

The previous prime is 120012121209977. The next prime is 120012121210049.

120012121210021 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 83787202996225 + 36224918213796 = 9153535^2 + 6018714^2 .

It is a cyclic number.

It is not a de Polignac number, because 120012121210021 - 2²³ = 120012112821413 is a prime.

It is a super-3 number, since 3×120012121210021³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120012121209977 and 120012121210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120012121210061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6060596160 + ... + 6060615961.

It is an arithmetic number, because the mean of its divisors is an integer number (30006060608011).

Almost surely, 2^{120012121210021} is an apocalyptic number.

It is an amenable number.

120012121210021 is a deficient number, since it is larger than the sum of its proper divisors (12121222023).

120012121210021 is an equidigital number, since it uses as much as digits as its factorization.

120012121210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12121222022.

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

The spelling of 120012121210021 in words is "one hundred twenty trillion, twelve billion, one hundred twenty-one million, two hundred ten thousand, twenty-one".