120221210121 has 8 divisors (see below), whose sum is σ = 160297947744. Its totient is φ = 80145972960.

The previous prime is 120221210093. The next prime is 120221210191. The reversal of 120221210121 is 121012122021.

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

It is not a de Polignac number, because 120221210121 - 2²¹ = 120219112969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120221210121.

It is not an unprimeable number, because it can be changed into a prime (120221210191) 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, 172531 + ... + 519816.

It is an arithmetic number, because the mean of its divisors is an integer number (20037243468).

Almost surely, 2^120221210121 is an apocalyptic number.

It is an amenable number.

120221210121 is a deficient number, since it is larger than the sum of its proper divisors (40076737623).

120221210121 is an equidigital number, since it uses as much as digits as its factorization.

120221210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750231.

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

Adding to 120221210121 its reverse (121012122021), we get a palindrome (241233332142).

The spelling of 120221210121 in words is "one hundred twenty billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".