1232011221 has 16 divisors (see below), whose sum is σ = 1878839424. Its totient is φ = 703448064.

The previous prime is 1232011217. The next prime is 1232011223. The reversal of 1232011221 is 1221102321.

It is not a de Polignac number, because 1232011221 - 2² = 1232011217 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1232011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232011223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4621 + ... + 49853.

It is an arithmetic number, because the mean of its divisors is an integer number (117427464).

Almost surely, 2^1232011221 is an apocalyptic number.

It is an amenable number.

1232011221 is a deficient number, since it is larger than the sum of its proper divisors (646828203).

1232011221 is a wasteful number, since it uses less digits than its factorization.

1232011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46540.

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

The square root of 1232011221 is about 35100.0173931581. The cubic root of 1232011221 is about 1072.0249368248.

Adding to 1232011221 its reverse (1221102321), we get a palindrome (2453113542).

The spelling of 1232011221 in words is "one billion, two hundred thirty-two million, eleven thousand, two hundred twenty-one".