12120021120221 has 16 divisors (see below), whose sum is σ = 13943240424960. Its totient is φ = 10319782561920.

The previous prime is 12120021120217. The next prime is 12120021120269. The reversal of 12120021120221 is 12202112002121.

It is a cyclic number.

It is not a de Polignac number, because 12120021120221 - 2² = 12120021120217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12120021120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120021180221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2899961 + ... + 5714001.

It is an arithmetic number, because the mean of its divisors is an integer number (871452526560).

Almost surely, 2^{12120021120221} is an apocalyptic number.

It is an amenable number.

12120021120221 is a deficient number, since it is larger than the sum of its proper divisors (1823219304739).

12120021120221 is a wasteful number, since it uses less digits than its factorization.

12120021120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818124.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12120021120221 its reverse (12202112002121), we get a palindrome (24322133122342).

The spelling of 12120021120221 in words is "twelve trillion, one hundred twenty billion, twenty-one million, one hundred twenty thousand, two hundred twenty-one".