1222210331 has 4 divisors (see below), whose sum is σ = 1222541472. Its totient is φ = 1221879192.

The previous prime is 1222210313. The next prime is 1222210357. The reversal of 1222210331 is 1330122221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222210331 - 2⁶ = 1222210267 is a prime.

It is a super-2 number, since 2×1222210331² = 2987596186406259122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222210361) 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, 159971 + ... + 167436.

It is an arithmetic number, because the mean of its divisors is an integer number (305635368).

Almost surely, 2^1222210331 is an apocalyptic number.

1222210331 is a deficient number, since it is larger than the sum of its proper divisors (331141).

1222210331 is an equidigital number, since it uses as much as digits as its factorization.

1222210331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331140.

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

The square root of 1222210331 is about 34960.1248710585. The cubic root of 1222210331 is about 1069.1746425780.

Adding to 1222210331 its reverse (1330122221), we get a palindrome (2552332552).

The spelling of 1222210331 in words is "one billion, two hundred twenty-two million, two hundred ten thousand, three hundred thirty-one".