1121780771 has 8 divisors (see below), whose sum is σ = 1171182624. Its totient is φ = 1072431360.

The previous prime is 1121780749. The next prime is 1121780791. The reversal of 1121780771 is 1770871211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1121780771 - 2²² = 1117586467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121780701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34301 + ... + 58481.

It is an arithmetic number, because the mean of its divisors is an integer number (146397828).

Almost surely, 2^1121780771 is an apocalyptic number.

1121780771 is a deficient number, since it is larger than the sum of its proper divisors (49401853).

1121780771 is a wasteful number, since it uses less digits than its factorization.

1121780771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26221.

The product of its (nonzero) digits is 5488, while the sum is 35.

The square root of 1121780771 is about 33492.9958498788. The cubic root of 1121780771 is about 1039.0489243344.

The spelling of 1121780771 in words is "one billion, one hundred twenty-one million, seven hundred eighty thousand, seven hundred seventy-one".