1210231221 has 8 divisors (see below), whose sum is σ = 1613811264. Its totient is φ = 806736000.

The previous prime is 1210231177. The next prime is 1210231229. The reversal of 1210231221 is 1221320121.

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

It is not a de Polignac number, because 1210231221 - 2⁷ = 1210231093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210231229) 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, 29221 + ... + 57221.

It is an arithmetic number, because the mean of its divisors is an integer number (201726408).

Almost surely, 2^1210231221 is an apocalyptic number.

It is an amenable number.

1210231221 is a deficient number, since it is larger than the sum of its proper divisors (403580043).

1210231221 is a wasteful number, since it uses less digits than its factorization.

1210231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42411.

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

The square root of 1210231221 is about 34788.3776712856. The cubic root of 1210231221 is about 1065.6701083705.

Adding to 1210231221 its reverse (1221320121), we get a palindrome (2431551342).

Subtracting 1210231221 from its reverse (1221320121), we obtain a square (11088900 = 3330²).

The spelling of 1210231221 in words is "one billion, two hundred ten million, two hundred thirty-one thousand, two hundred twenty-one".