120001212222221 has 8 divisors (see below), whose sum is σ = 135424565517600. Its totient is φ = 105330217624240.

The previous prime is 120001212222179. The next prime is 120001212222257. The reversal of 120001212222221 is 122222212100021.

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 120001212222221 - 2¹⁴ = 120001212205837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120001212222193 and 120001212222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001212225221) 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, 188089674011 + ... + 188089674648.

It is an arithmetic number, because the mean of its divisors is an integer number (16928070689700).

Almost surely, 2^{120001212222221} is an apocalyptic number.

120001212222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120001212222221 is a deficient number, since it is larger than the sum of its proper divisors (15423353295379).

120001212222221 is a wasteful number, since it uses less digits than its factorization.

120001212222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376179348699.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 120001212222221 its reverse (122222212100021), we get a palindrome (242223424322242).

The spelling of 120001212222221 in words is "one hundred twenty trillion, one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty-one".