2011021022009 has 2 divisors, whose sum is σ = 2011021022010. Its totient is φ = 2011021022008.

The previous prime is 2011021021991. The next prime is 2011021022081. The reversal of 2011021022009 is 9002201201102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1018202083600 + 992818938409 = 1009060^2 + 996403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011021022009 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011021022609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005510511004 + 1005510511005.

It is an arithmetic number, because the mean of its divisors is an integer number (1005510511005).

Almost surely, 2^{2011021022009} is an apocalyptic number.

It is an amenable number.

2011021022009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011021022009 is an equidigital number, since it uses as much as digits as its factorization.

2011021022009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 2011021022009 in words is "two trillion, eleven billion, twenty-one million, twenty-two thousand, nine".