120121210221 has 8 divisors (see below), whose sum is σ = 168591172320. Its totient is φ = 75866027472.

The previous prime is 120121210217. The next prime is 120121210241. The reversal of 120121210221 is 122012121021.

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

It is not a de Polignac number, because 120121210221 - 2² = 120121210217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120121210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121210241) 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 7 ways as a sum of consecutive naturals, for example, 1053694770 + ... + 1053694883.

It is an arithmetic number, because the mean of its divisors is an integer number (21073896540).

Almost surely, 2^120121210221 is an apocalyptic number.

It is an amenable number.

120121210221 is a deficient number, since it is larger than the sum of its proper divisors (48469962099).

120121210221 is a wasteful number, since it uses less digits than its factorization.

120121210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107389675.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120121210221 its reverse (122012121021), we get a palindrome (242133331242).

The spelling of 120121210221 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".