1101011989 has 24 divisors (see below), whose sum is σ = 1402734528. Its totient is φ = 839547840.

The previous prime is 1101011957. The next prime is 1101012023. The reversal of 1101011989 is 9891101011.

It is not a de Polignac number, because 1101011989 - 2⁵ = 1101011957 is a prime.

It is a super-2 number, since 2×1101011989² = 2424454799843472242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1101011989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101011389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166857 + ... + 173329.

It is an arithmetic number, because the mean of its divisors is an integer number (58447272).

Almost surely, 2^1101011989 is an apocalyptic number.

It is an amenable number.

1101011989 is a deficient number, since it is larger than the sum of its proper divisors (301722539).

1101011989 is an equidigital number, since it uses as much as digits as its factorization.

1101011989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6585 (or 6538 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 31.

The square root of 1101011989 is about 33181.5007044588. The cubic root of 1101011989 is about 1032.5965808890.

The spelling of 1101011989 in words is "one billion, one hundred one million, eleven thousand, nine hundred eighty-nine".