120212120112221 has 4 divisors (see below), whose sum is σ = 121562818091100. Its totient is φ = 118861422133344.

The previous prime is 120212120112199. The next prime is 120212120112289. The reversal of 120212120112221 is 122211021212021.

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 23716763640196 + 96495356472025 = 4869986^2 + 9823205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120212120112221 is a prime.

It is a super-3 number, since 3×120212120112221³ (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 = 120212120112193 and 120212120112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120212120114221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675348989306 + ... + 675348989483.

It is an arithmetic number, because the mean of its divisors is an integer number (30390704522775).

Almost surely, 2^{120212120112221} is an apocalyptic number.

It is an amenable number.

120212120112221 is a deficient number, since it is larger than the sum of its proper divisors (1350697978879).

120212120112221 is an equidigital number, since it uses as much as digits as its factorization.

120212120112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350697978878.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 120212120112221 its reverse (122211021212021), we get a palindrome (242423141324242).

The spelling of 120212120112221 in words is "one hundred twenty trillion, two hundred twelve billion, one hundred twenty million, one hundred twelve thousand, two hundred twenty-one".