12120122221 has 8 divisors (see below), whose sum is σ = 12582370080. Its totient is φ = 11660828592.

The previous prime is 12120122219. The next prime is 12120122233. The reversal of 12120122221 is 12222102121.

It is a happy number.

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 12120122221 - 2¹ = 12120122219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120122195 and 12120122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120125221) 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, 730195 + ... + 746608.

It is an arithmetic number, because the mean of its divisors is an integer number (1572796260).

Almost surely, 2^12120122221 is an apocalyptic number.

It is an amenable number.

12120122221 is a deficient number, since it is larger than the sum of its proper divisors (462247859).

12120122221 is a wasteful number, since it uses less digits than its factorization.

12120122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477115.

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

Adding to 12120122221 its reverse (12222102121), we get a palindrome (24342224342).

The spelling of 12120122221 in words is "twelve billion, one hundred twenty million, one hundred twenty-two thousand, two hundred twenty-one".