1101111971 has 16 divisors (see below), whose sum is σ = 1176698880. Its totient is φ = 1028492640.

The previous prime is 1101111943. The next prime is 1101111989. The reversal of 1101111971 is 1791111011.

It is a cyclic number.

It is not a de Polignac number, because 1101111971 - 2²⁶ = 1034003107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101111901) 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, 141890 + ... + 149448.

It is an arithmetic number, because the mean of its divisors is an integer number (73543680).

Almost surely, 2^1101111971 is an apocalyptic number.

1101111971 is a deficient number, since it is larger than the sum of its proper divisors (75586909).

1101111971 is a wasteful number, since it uses less digits than its factorization.

1101111971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7754.

The product of its (nonzero) digits is 63, while the sum is 23.

The square root of 1101111971 is about 33183.0072627542. The cubic root of 1101111971 is about 1032.6278363605.

Adding to 1101111971 its reverse (1791111011), we get a palindrome (2892222982).

The spelling of 1101111971 in words is "one billion, one hundred one million, one hundred eleven thousand, nine hundred seventy-one".