1220120202187 has 2 divisors, whose sum is σ = 1220120202188. Its totient is φ = 1220120202186.

The previous prime is 1220120202181. The next prime is 1220120202253. The reversal of 1220120202187 is 7812020210221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220120202187 - 2¹¹ = 1220120200139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220120202181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610060101093 + 610060101094.

It is an arithmetic number, because the mean of its divisors is an integer number (610060101094).

Almost surely, 2^{1220120202187} is an apocalyptic number.

1220120202187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220120202187 is an equidigital number, since it uses as much as digits as its factorization.

1220120202187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 28.

The spelling of 1220120202187 in words is "one trillion, two hundred twenty billion, one hundred twenty million, two hundred two thousand, one hundred eighty-seven".