1121454021 has 8 divisors (see below), whose sum is σ = 1508990560. Its totient is φ = 740776752.

The previous prime is 1121454007. The next prime is 1121454029. The reversal of 1121454021 is 1204541211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121454021 - 2¹¹ = 1121451973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121454029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1714435 + ... + 1715088.

It is an arithmetic number, because the mean of its divisors is an integer number (188623820).

Almost surely, 2^1121454021 is an apocalyptic number.

It is an amenable number.

1121454021 is a deficient number, since it is larger than the sum of its proper divisors (387536539).

1121454021 is a wasteful number, since it uses less digits than its factorization.

1121454021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429635.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1121454021 is about 33488.1176090864. The cubic root of 1121454021 is about 1038.9480305252.

Adding to 1121454021 its reverse (1204541211), we get a palindrome (2325995232).

The spelling of 1121454021 in words is "one billion, one hundred twenty-one million, four hundred fifty-four thousand, twenty-one".