1011201022009 has 2 divisors, whose sum is σ = 1011201022010. Its totient is φ = 1011201022008.

The previous prime is 1011201021979. The next prime is 1011201022019. The reversal of 1011201022009 is 9002201021101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 959684733225 + 51516288784 = 979635^2 + 226972^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011201022009 - 2⁵ = 1011201021977 is a prime.

It is a super-2 number, since 2×1011201022009² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011201022019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505600511004 + 505600511005.

It is an arithmetic number, because the mean of its divisors is an integer number (505600511005).

Almost surely, 2^{1011201022009} is an apocalyptic number.

It is an amenable number.

1011201022009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011201022009 is an equidigital number, since it uses as much as digits as its factorization.

1011201022009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 1011201022009 in words is "one trillion, eleven billion, two hundred one million, twenty-two thousand, nine".