1151017221 has 32 divisors (see below), whose sum is σ = 1669662720. Its totient is φ = 703102400.

The previous prime is 1151017211. The next prime is 1151017223. The reversal of 1151017221 is 1227101511.

It is a cyclic number.

It is not a de Polignac number, because 1151017221 - 2¹⁵ = 1150984453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151017223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259936 + ... + 264326.

It is an arithmetic number, because the mean of its divisors is an integer number (52176960).

Almost surely, 2^1151017221 is an apocalyptic number.

It is an amenable number.

1151017221 is a deficient number, since it is larger than the sum of its proper divisors (518645499).

1151017221 is a wasteful number, since it uses less digits than its factorization.

1151017221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577.

The product of its (nonzero) digits is 140, while the sum is 21.

The square root of 1151017221 is about 33926.6447058945. The cubic root of 1151017221 is about 1047.9983699084.

Adding to 1151017221 its reverse (1227101511), we get a palindrome (2378118732).

The spelling of 1151017221 in words is "one billion, one hundred fifty-one million, seventeen thousand, two hundred twenty-one".