1121747881 has 8 divisors (see below), whose sum is σ = 1171145664. Its totient is φ = 1072402320.

The previous prime is 1121747831. The next prime is 1121747933. The reversal of 1121747881 is 1887471211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121747881 is a prime.

It is a super-2 number, since 2×1121747881² = 2516636617055980322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121747801) 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, 34591 + ... + 58651.

It is an arithmetic number, because the mean of its divisors is an integer number (146393208).

Almost surely, 2^1121747881 is an apocalyptic number.

It is an amenable number.

1121747881 is a deficient number, since it is larger than the sum of its proper divisors (49397783).

1121747881 is a wasteful number, since it uses less digits than its factorization.

1121747881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26111.

The product of its digits is 25088, while the sum is 40.

The square root of 1121747881 is about 33492.5048481000. The cubic root of 1121747881 is about 1039.0387694526.

The spelling of 1121747881 in words is "one billion, one hundred twenty-one million, seven hundred forty-seven thousand, eight hundred eighty-one".