1121071451 has 16 divisors (see below), whose sum is σ = 1181433600. Its totient is φ = 1061737248.

The previous prime is 1121071433. The next prime is 1121071453. The reversal of 1121071451 is 1541701211.

It is a cyclic number.

It is not a de Polignac number, because 1121071451 - 2⁶ = 1121071387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121071453) 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, 1304660 + ... + 1305518.

It is an arithmetic number, because the mean of its divisors is an integer number (73839600).

Almost surely, 2^1121071451 is an apocalyptic number.

1121071451 is a deficient number, since it is larger than the sum of its proper divisors (60362149).

1121071451 is a wasteful number, since it uses less digits than its factorization.

1121071451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 1121071451 is about 33482.4050958111. The cubic root of 1121071451 is about 1038.8298757171.

Adding to 1121071451 its reverse (1541701211), we get a palindrome (2662772662).

The spelling of 1121071451 in words is "one billion, one hundred twenty-one million, seventy-one thousand, four hundred fifty-one".