1129011221 has 8 divisors (see below), whose sum is σ = 1216314624. Its totient is φ = 1041773040.

The previous prime is 1129011193. The next prime is 1129011223. The reversal of 1129011221 is 1221109211.

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-1129011221 is a prime.

It is a super-3 number, since 3×1129011221³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1129011193 and 1129011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129011223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23216 + ... + 52886.

It is an arithmetic number, because the mean of its divisors is an integer number (152039328).

Almost surely, 2^1129011221 is an apocalyptic number.

It is an amenable number.

1129011221 is a deficient number, since it is larger than the sum of its proper divisors (87303403).

1129011221 is a wasteful number, since it uses less digits than its factorization.

1129011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32611.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1129011221 is about 33600.7622086166. The cubic root of 1129011221 is about 1041.2765454471.

The spelling of 1129011221 in words is "one billion, one hundred twenty-nine million, eleven thousand, two hundred twenty-one".