11020012009 has 2 divisors, whose sum is σ = 11020012010. Its totient is φ = 11020012008.

The previous prime is 11020011971. The next prime is 11020012013. The reversal of 11020012009 is 90021002011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5564712409 + 5455299600 = 74597^2 + 73860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11020012009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11020011983 and 11020012001.

It is not a weakly prime, because it can be changed into another prime (11020012019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510006004 + 5510006005.

It is an arithmetic number, because the mean of its divisors is an integer number (5510006005).

Almost surely, 2^11020012009 is an apocalyptic number.

It is an amenable number.

11020012009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020012009 is an equidigital number, since it uses as much as digits as its factorization.

11020012009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 11020012009 in words is "eleven billion, twenty million, twelve thousand, nine".