120001212221 has 8 divisors (see below), whose sum is σ = 131022221088. Its totient is φ = 108998838000.

The previous prime is 120001212217. The next prime is 120001212307. The reversal of 120001212221 is 122212100021.

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

It is a cyclic number.

It is not a de Polignac number, because 120001212221 - 2² = 120001212217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120001212196 and 120001212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001212521) 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, 4645190 + ... + 4670951.

It is an arithmetic number, because the mean of its divisors is an integer number (16377777636).

Almost surely, 2^120001212221 is an apocalyptic number.

120001212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120001212221 is a deficient number, since it is larger than the sum of its proper divisors (11021008867).

120001212221 is a wasteful number, since it uses less digits than its factorization.

120001212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9317323.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 120001212221 its reverse (122212100021), we get a palindrome (242213312242).

It can be divided in two parts, 12000 and 1212221, that added together give a palindrome (1224221).

The spelling of 120001212221 in words is "one hundred twenty billion, one million, two hundred twelve thousand, two hundred twenty-one".