1213230221 has 8 divisors (see below), whose sum is σ = 1420367424. Its totient is φ = 1014547680.

The previous prime is 1213230209. The next prime is 1213230241. The reversal of 1213230221 is 1220323121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213230221 - 2²⁶ = 1146121357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213230221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213230241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2113355 + ... + 2113928.

It is an arithmetic number, because the mean of its divisors is an integer number (177545928).

Almost surely, 2^1213230221 is an apocalyptic number.

It is an amenable number.

1213230221 is a deficient number, since it is larger than the sum of its proper divisors (207137203).

1213230221 is an equidigital number, since it uses as much as digits as its factorization.

1213230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227331.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1213230221 is about 34831.4544772394. The cubic root of 1213230221 is about 1066.5496395808.

Adding to 1213230221 its reverse (1220323121), we get a palindrome (2433553342).

The spelling of 1213230221 in words is "one billion, two hundred thirteen million, two hundred thirty thousand, two hundred twenty-one".