12120221108987 has 2 divisors, whose sum is σ = 12120221108988. Its totient is φ = 12120221108986.

The previous prime is 12120221108951. The next prime is 12120221109001. The reversal of 12120221108987 is 78980112202121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120221108987 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120221108087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060110554493 + 6060110554494.

It is an arithmetic number, because the mean of its divisors is an integer number (6060110554494).

Almost surely, 2^{12120221108987} is an apocalyptic number.

12120221108987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120221108987 is an equidigital number, since it uses as much as digits as its factorization.

12120221108987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 44.

The spelling of 12120221108987 in words is "twelve trillion, one hundred twenty billion, two hundred twenty-one million, one hundred eight thousand, nine hundred eighty-seven".