1220002120187 has 2 divisors, whose sum is σ = 1220002120188. Its totient is φ = 1220002120186.

The previous prime is 1220002120153. The next prime is 1220002120219. The reversal of 1220002120187 is 7810212000221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220002120187 - 2⁶ = 1220002120123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220002125187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610001060093 + 610001060094.

It is an arithmetic number, because the mean of its divisors is an integer number (610001060094).

Almost surely, 2^{1220002120187} is an apocalyptic number.

1220002120187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220002120187 is an equidigital number, since it uses as much as digits as its factorization.

1220002120187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

The spelling of 1220002120187 in words is "one trillion, two hundred twenty billion, two million, one hundred twenty thousand, one hundred eighty-seven".