1210143221 has 4 divisors (see below), whose sum is σ = 1383020832. Its totient is φ = 1037265612.

The previous prime is 1210143217. The next prime is 1210143227. The reversal of 1210143221 is 1223410121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1210143221 - 2² = 1210143217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210143221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210143227) 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 3 ways as a sum of consecutive naturals, for example, 86438795 + ... + 86438808.

It is an arithmetic number, because the mean of its divisors is an integer number (345755208).

Almost surely, 2^1210143221 is an apocalyptic number.

It is an amenable number.

1210143221 is a deficient number, since it is larger than the sum of its proper divisors (172877611).

1210143221 is an equidigital number, since it uses as much as digits as its factorization.

1210143221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172877610.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1210143221 is about 34787.1128580686. The cubic root of 1210143221 is about 1065.6442782534.

Adding to 1210143221 its reverse (1223410121), we get a palindrome (2433553342).

The spelling of 1210143221 in words is "one billion, two hundred ten million, one hundred forty-three thousand, two hundred twenty-one".