1121400571 has 4 divisors (see below), whose sum is σ = 1122423912. Its totient is φ = 1120377232.

The previous prime is 1121400517. The next prime is 1121400583. The reversal of 1121400571 is 1750041211.

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

It is a cyclic number.

It is not a de Polignac number, because 1121400571 - 2¹³ = 1121392379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121430571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510025 + ... + 512218.

It is an arithmetic number, because the mean of its divisors is an integer number (280605978).

Almost surely, 2^1121400571 is an apocalyptic number.

1121400571 is a deficient number, since it is larger than the sum of its proper divisors (1023341).

1121400571 is a wasteful number, since it uses less digits than its factorization.

1121400571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023340.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 1121400571 is about 33487.3195553182. The cubic root of 1121400571 is about 1038.9315243782.

Adding to 1121400571 its reverse (1750041211), we get a palindrome (2871441782).

The spelling of 1121400571 in words is "one billion, one hundred twenty-one million, four hundred thousand, five hundred seventy-one".