1022120009 has 2 divisors, whose sum is σ = 1022120010. Its totient is φ = 1022120008.

The previous prime is 1022119981. The next prime is 1022120059. The reversal of 1022120009 is 9000212201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 514609225 + 507510784 = 22685^2 + 22528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022120009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1022120059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511060004 + 511060005.

It is an arithmetic number, because the mean of its divisors is an integer number (511060005).

Almost surely, 2^1022120009 is an apocalyptic number.

It is an amenable number.

1022120009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022120009 is an equidigital number, since it uses as much as digits as its factorization.

1022120009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1022120009 is about 31970.6116456974. The cubic root of 1022120009 is about 1007.3196286486.

The spelling of 1022120009 in words is "one billion, twenty-two million, one hundred twenty thousand, nine".