1230221210221 has 4 divisors (see below), whose sum is σ = 1231121153952. Its totient is φ = 1229321266492.

The previous prime is 1230221210171. The next prime is 1230221210243. The reversal of 1230221210221 is 1220121220321.

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 1230221210221 - 2⁷ = 1230221210093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230221210291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449969815 + ... + 449972548.

It is an arithmetic number, because the mean of its divisors is an integer number (307780288488).

Almost surely, 2^{1230221210221} is an apocalyptic number.

It is an amenable number.

1230221210221 is a deficient number, since it is larger than the sum of its proper divisors (899943731).

1230221210221 is an equidigital number, since it uses as much as digits as its factorization.

1230221210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899943730.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1230221210221 its reverse (1220121220321), we get a palindrome (2450342430542).

The spelling of 1230221210221 in words is "one trillion, two hundred thirty billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".