1011232221 has 8 divisors (see below), whose sum is σ = 1348656960. Its totient is φ = 673981152.

The previous prime is 1011232207. The next prime is 1011232249. The reversal of 1011232221 is 1222321101.

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

It is not a de Polignac number, because 1011232221 - 2¹⁰ = 1011231197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011232221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011232721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29161 + ... + 53598.

It is an arithmetic number, because the mean of its divisors is an integer number (168582120).

Almost surely, 2^1011232221 is an apocalyptic number.

It is an amenable number.

1011232221 is a deficient number, since it is larger than the sum of its proper divisors (337424739).

1011232221 is an equidigital number, since it uses as much as digits as its factorization.

1011232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86835.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1011232221 is about 31799.8776884440. The cubic root of 1011232221 is about 1003.7301424040.

Adding to 1011232221 its reverse (1222321101), we get a palindrome (2233553322).

The spelling of 1011232221 in words is "one billion, eleven million, two hundred thirty-two thousand, two hundred twenty-one".