120120101000021 has 16 divisors (see below), whose sum is σ = 122108402700288. Its totient is φ = 118140174490800.

The previous prime is 120120101000017. The next prime is 120120101000047. The reversal of 120120101000021 is 120000101021021.

It is a cyclic number.

It is not a de Polignac number, because 120120101000021 - 2² = 120120101000017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120120100999966 and 120120101000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120120103000021) 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 15 ways as a sum of consecutive naturals, for example, 120179090 + ... + 121174476.

It is an arithmetic number, because the mean of its divisors is an integer number (7631775168768).

Almost surely, 2^{120120101000021} is an apocalyptic number.

It is an amenable number.

120120101000021 is a deficient number, since it is larger than the sum of its proper divisors (1988301700267).

120120101000021 is an equidigital number, since it uses as much as digits as its factorization.

120120101000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999592.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 120120101000021 its reverse (120000101021021), we get a palindrome (240120202021042).

The spelling of 120120101000021 in words is "one hundred twenty trillion, one hundred twenty billion, one hundred one million, twenty-one", and thus it is an aban number.