120020121021221 has 8 divisors (see below), whose sum is σ = 122019128676984. Its totient is φ = 118022128355520.

The previous prime is 120020121021169. The next prime is 120020121021233. The reversal of 120020121021221 is 122120121020021.

It can be written as a sum of positive squares in 4 ways, for example, as 7243154898721 + 112776966122500 = 2691311^2 + 10619650^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120020121021221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120020121021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120020121021721) 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, 253509050 + ... + 253982043.

It is an arithmetic number, because the mean of its divisors is an integer number (15252391084623).

Almost surely, 2^{120020121021221} is an apocalyptic number.

It is an amenable number.

120020121021221 is a deficient number, since it is larger than the sum of its proper divisors (1999007655763).

120020121021221 is an equidigital number, since it uses as much as digits as its factorization.

120020121021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507495031.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 120020121021221 its reverse (122120121020021), we get a palindrome (242140242041242).

The spelling of 120020121021221 in words is "one hundred twenty trillion, twenty billion, one hundred twenty-one million, twenty-one thousand, two hundred twenty-one".