1011012009 has 16 divisors (see below), whose sum is σ = 1541130240. Its totient is φ = 577518480.

The previous prime is 1011011999. The next prime is 1011012031. The reversal of 1011012009 is 9002101101.

It is not a de Polignac number, because 1011012009 - 2⁴ = 1011011993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011017009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69622 + ... + 82880.

It is an arithmetic number, because the mean of its divisors is an integer number (96320640).

Almost surely, 2^1011012009 is an apocalyptic number.

It is an amenable number.

1011012009 is a deficient number, since it is larger than the sum of its proper divisors (530118231).

1011012009 is a wasteful number, since it uses less digits than its factorization.

1011012009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16900.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 1011012009 is about 31796.4150337739. The cubic root of 1011012009 is about 1003.6572776804.

The spelling of 1011012009 in words is "one billion, eleven million, twelve thousand, nine".