1119869781121 has 81 divisors (see below), whose sum is σ = 1464593897403. Its totient is φ = 853363929600.

The previous prime is 1119869781103. The next prime is 1119869781127. The reversal of 1119869781121 is 1211879689111.

The square root of 1119869781121 is 1058239.

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

It can be written as a sum of positive squares in 13 ways, for example, as 226209628225 + 893660152896 = 475615^2 + 945336^2 .

It is not a de Polignac number, because 1119869781121 - 2⁵ = 1119869781089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1119869781127) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2792692521 + ... + 2792692921.

Almost surely, 2^{1119869781121} is an apocalyptic number.

1119869781121 is the 1058239-th square number.

1119869781121 is the 529120-th centered octagonal number.

It is an amenable number.

1119869781121 is a deficient number, since it is larger than the sum of its proper divisors (344724116282).

1119869781121 is an frugal number, since it uses more digits than its factorization.

1119869781121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 450 counting only the distinct ones).

The product of its digits is 435456, while the sum is 55.

The spelling of 1119869781121 in words is "one trillion, one hundred nineteen billion, eight hundred sixty-nine million, seven hundred eighty-one thousand, one hundred twenty-one".