1121443401 has 32 divisors (see below), whose sum is σ = 1631121408. Its totient is φ = 681246720.

The previous prime is 1121443399. The next prime is 1121443409. The reversal of 1121443401 is 1043441211.

It is not a de Polignac number, because 1121443401 - 2¹ = 1121443399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121443409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1272481 + ... + 1273361.

It is an arithmetic number, because the mean of its divisors is an integer number (50972544).

Almost surely, 2^1121443401 is an apocalyptic number.

It is an amenable number.

1121443401 is a deficient number, since it is larger than the sum of its proper divisors (509678007).

1121443401 is a wasteful number, since it uses less digits than its factorization.

1121443401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1121443401 is about 33487.9590450060. The cubic root of 1121443401 is about 1038.9447509546.

Adding to 1121443401 its reverse (1043441211), we get a palindrome (2164884612).

It can be divided in two parts, 11214 and 43401, that added together give a triangular number (54615 = T₃₃₀).

The spelling of 1121443401 in words is "one billion, one hundred twenty-one million, four hundred forty-three thousand, four hundred one".