1011111201009 has 96 divisors (see below), whose sum is σ = 1846979656704. Its totient is φ = 518675374080.

The previous prime is 1011111200971. The next prime is 1011111201047. The reversal of 1011111201009 is 9001021111101.

It is an interprime number because it is at equal distance from previous prime (1011111200971) and next prime (1011111201047).

It is not a de Polignac number, because 1011111201009 - 2¹¹ = 1011111198961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011111200982 and 1011111201000.

It is not an unprimeable number, because it can be changed into a prime (1011111202009) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 77053969 + ... + 77067089.

It is an arithmetic number, because the mean of its divisors is an integer number (19239371424).

Almost surely, 2^{1011111201009} is an apocalyptic number.

It is an amenable number.

1011111201009 is a deficient number, since it is larger than the sum of its proper divisors (835868455695).

1011111201009 is a wasteful number, since it uses less digits than its factorization.

1011111201009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15727 (or 15724 counting only the distinct ones).

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

The spelling of 1011111201009 in words is "one trillion, eleven billion, one hundred eleven million, two hundred one thousand, nine".