12210601221 has 24 divisors (see below), whose sum is σ = 21707736960. Its totient is φ = 6440756256.

The previous prime is 12210601201. The next prime is 12210601241.

12210601221 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (12210601201) and next prime (12210601241).

It is not a de Polignac number, because 12210601221 - 2⁷ = 12210601093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210601194 and 12210601203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210601201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7453761 + ... + 7455398.

It is an arithmetic number, because the mean of its divisors is an integer number (904489040).

Almost surely, 2^12210601221 is an apocalyptic number.

It is an amenable number.

12210601221 is a deficient number, since it is larger than the sum of its proper divisors (9497135739).

12210601221 is a wasteful number, since it uses less digits than its factorization.

12210601221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14909185 (or 14909182 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The spelling of 12210601221 in words is "twelve billion, two hundred ten million, six hundred one thousand, two hundred twenty-one".