1121444121 has 16 divisors (see below), whose sum is σ = 1725461504. Its totient is φ = 634602384.

The previous prime is 1121444099. The next prime is 1121444131. The reversal of 1121444121 is 1214441211.

It is not a de Polignac number, because 1121444121 - 2¹⁷ = 1121313049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121444131) 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, 257071 + ... + 261396.

It is an arithmetic number, because the mean of its divisors is an integer number (107841344).

Almost surely, 2^1121444121 is an apocalyptic number.

It is an amenable number.

1121444121 is a deficient number, since it is larger than the sum of its proper divisors (604017383).

1121444121 is a wasteful number, since it uses less digits than its factorization.

1121444121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518580.

The product of its digits is 256, while the sum is 21.

The square root of 1121444121 is about 33487.9697951369. The cubic root of 1121444121 is about 1038.9449732990.

Adding to 1121444121 its reverse (1214441211), we get a palindrome (2335885332).

The spelling of 1121444121 in words is "one billion, one hundred twenty-one million, four hundred forty-four thousand, one hundred twenty-one".