120021120101021 has 4 divisors (see below), whose sum is σ = 120125214742332. Its totient is φ = 119917025459712.

The previous prime is 120021120100967. The next prime is 120021120101137. The reversal of 120021120101021 is 120101021120021.

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 81905486527225 + 38115633573796 = 9050165^2 + 6173786^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021120101021 - 2³⁴ = 120003940231837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120021120100987 and 120021120101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021120151021) 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, 52047318926 + ... + 52047321231.

It is an arithmetic number, because the mean of its divisors is an integer number (30031303685583).

Almost surely, 2^{120021120101021} is an apocalyptic number.

It is an amenable number.

120021120101021 is a deficient number, since it is larger than the sum of its proper divisors (104094641311).

120021120101021 is a wasteful number, since it uses less digits than its factorization.

120021120101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104094641310.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 120021120101021 its reverse (120101021120021), we get a palindrome (240122141221042).

It can be divided in two parts, 120021 and 120101021, that multiplied together give a palindrome (14414644641441).

The spelling of 120021120101021 in words is "one hundred twenty trillion, twenty-one billion, one hundred twenty million, one hundred one thousand, twenty-one".