12121202423221 has 8 divisors (see below), whose sum is σ = 12403179360000. Its totient is φ = 11839229509632.

The previous prime is 12121202423147. The next prime is 12121202423243. The reversal of 12121202423221 is 12232420212121.

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 12121202423221 - 2⁹ = 12121202422709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121202421221) 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, 5586780 + ... + 7446778.

It is an arithmetic number, because the mean of its divisors is an integer number (1550397420000).

Almost surely, 2^{12121202423221} is an apocalyptic number.

It is an amenable number.

12121202423221 is a deficient number, since it is larger than the sum of its proper divisors (281976936779).

12121202423221 is a wasteful number, since it uses less digits than its factorization.

12121202423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011595.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 12121202423221 its reverse (12232420212121), we get a palindrome (24353622635342).

The spelling of 12121202423221 in words is "twelve trillion, one hundred twenty-one billion, two hundred two million, four hundred twenty-three thousand, two hundred twenty-one".