1121555321 has 8 divisors (see below), whose sum is σ = 1130890464. Its totient is φ = 1112232160.

The previous prime is 1121555291. The next prime is 1121555341. The reversal of 1121555321 is 1235551211.

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-1121555321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121555341) 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, 362246 + ... + 365328.

It is an arithmetic number, because the mean of its divisors is an integer number (141361308).

Almost surely, 2^1121555321 is an apocalyptic number.

It is an amenable number.

1121555321 is a deficient number, since it is larger than the sum of its proper divisors (9335143).

1121555321 is a wasteful number, since it uses less digits than its factorization.

1121555321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5991.

The product of its digits is 1500, while the sum is 26.

The square root of 1121555321 is about 33489.6300517041. The cubic root of 1121555321 is about 1038.9793120177.

The spelling of 1121555321 in words is "one billion, one hundred twenty-one million, five hundred fifty-five thousand, three hundred twenty-one".