1101111489 has 21 divisors (see below), whose sum is σ = 1652256403. Its totient is φ = 733477032.

The previous prime is 1101111443. The next prime is 1101111491. The reversal of 1101111489 is 9841111011.

It is a happy number.

The square root of 1101111489 is 33183.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1086823089 + 14288400 = 32967^2 + 3780^2 .

It is not a de Polignac number, because 1101111489 - 2²¹ = 1099014337 is a prime.

It is a super-2 number, since 2×1101111489² = 2424893022415594242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101111439) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 895327 + ... + 896555.

Almost surely, 2^1101111489 is an apocalyptic number.

1101111489 is the 33183-rd square number.

1101111489 is the 16592-nd centered octagonal number.

It is an amenable number.

1101111489 is a deficient number, since it is larger than the sum of its proper divisors (551144914).

1101111489 is an frugal number, since it uses more digits than its factorization.

1101111489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 27.

The cubic root of 1101111489 is about 1032.6276856865.

It can be divided in two parts, 11011 and 11489, that added together give a square (22500 = 150²).

The spelling of 1101111489 in words is "one billion, one hundred one million, one hundred eleven thousand, four hundred eighty-nine".