1111111010001 has 12 divisors (see below), whose sum is σ = 1605017037312. Its totient is φ = 740704252536.

The previous prime is 1111111009993. The next prime is 1111111010003. The reversal of 1111111010001 is 1000101111111.

It is not a de Polignac number, because 1111111010001 - 2³ = 1111111009993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1111111010003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2841201 + ... + 3208526.

It is an arithmetic number, because the mean of its divisors is an integer number (133751419776).

Almost surely, 2^{1111111010001} is an apocalyptic number.

It is an amenable number.

1111111010001 is a deficient number, since it is larger than the sum of its proper divisors (493906027311).

1111111010001 is a wasteful number, since it uses less digits than its factorization.

1111111010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6070140 (or 6070137 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 1111111010001 its reverse (1000101111111), we get a palindrome (2111212121112).

The spelling of 1111111010001 in words is "one trillion, one hundred eleven billion, one hundred eleven million, ten thousand, one".