120000012122221 has 32 divisors (see below), whose sum is σ = 152928262828800. Its totient is φ = 93344444928000.

The previous prime is 120000012122161. The next prime is 120000012122257. The reversal of 120000012122221 is 122221210000021.

It is a happy number.

It is not a de Polignac number, because 120000012122221 - 2⁷ = 120000012122093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120000012122195 and 120000012122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000072122221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25383580 + ... + 29737621.

It is an arithmetic number, because the mean of its divisors is an integer number (4779008213400).

Almost surely, 2^{120000012122221} is an apocalyptic number.

120000012122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120000012122221 is a deficient number, since it is larger than the sum of its proper divisors (32928250706579).

120000012122221 is an equidigital number, since it uses as much as digits as its factorization.

120000012122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55121810 (or 55121796 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 120000012122221 its reverse (122221210000021), we get a palindrome (242221222122242).

The spelling of 120000012122221 in words is "one hundred twenty trillion, twelve million, one hundred twenty-two thousand, two hundred twenty-one".