1022120011987 has 2 divisors, whose sum is σ = 1022120011988. Its totient is φ = 1022120011986.

The previous prime is 1022120011973. The next prime is 1022120011999. The reversal of 1022120011987 is 7891100212201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022120011987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022120011687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511060005993 + 511060005994.

It is an arithmetic number, because the mean of its divisors is an integer number (511060005994).

Almost surely, 2^{1022120011987} is an apocalyptic number.

1022120011987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022120011987 is an equidigital number, since it uses as much as digits as its factorization.

1022120011987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 1022120011987 in words is "one trillion, twenty-two billion, one hundred twenty million, eleven thousand, nine hundred eighty-seven".