1220002111087 has 2 divisors, whose sum is σ = 1220002111088. Its totient is φ = 1220002111086.

The previous prime is 1220002111021. The next prime is 1220002111093. The reversal of 1220002111087 is 7801112000221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220002111087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220002111007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610001055543 + 610001055544.

It is an arithmetic number, because the mean of its divisors is an integer number (610001055544).

Almost surely, 2^{1220002111087} is an apocalyptic number.

1220002111087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220002111087 is an equidigital number, since it uses as much as digits as its factorization.

1220002111087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 25.

The spelling of 1220002111087 in words is "one trillion, two hundred twenty billion, two million, one hundred eleven thousand, eighty-seven".