1121444011 has 4 divisors (see below), whose sum is σ = 1180467400. Its totient is φ = 1062420624.

The previous prime is 1121443991. The next prime is 1121444021. The reversal of 1121444011 is 1104441211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121444011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 59023369 = 1121444011 / (1 + 1 + 2 + 1 + 4 + 4 + 4 + 0 + 1 + 1).

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 1121444011.

It is not an unprimeable number, because it can be changed into a prime (1121444021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29511666 + ... + 29511703.

It is an arithmetic number, because the mean of its divisors is an integer number (295116850).

Almost surely, 2^1121444011 is an apocalyptic number.

1121444011 is a deficient number, since it is larger than the sum of its proper divisors (59023389).

1121444011 is an equidigital number, since it uses as much as digits as its factorization.

1121444011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59023388.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1121444011 is about 33487.9681527560. The cubic root of 1121444011 is about 1038.9449393297.

Adding to 1121444011 its reverse (1104441211), we get a palindrome (2225885222).

It can be divided in two parts, 11214 and 44011, that added together give a square (55225 = 235²).

The spelling of 1121444011 in words is "one billion, one hundred twenty-one million, four hundred forty-four thousand, eleven".