1222012331 has 4 divisors (see below), whose sum is σ = 1224183432. Its totient is φ = 1219841232.

The previous prime is 1222012327. The next prime is 1222012349. The reversal of 1222012331 is 1332102221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1332102221 = 6719 ⋅198259.

It is a cyclic number.

It is not a de Polignac number, because 1222012331 - 2² = 1222012327 is a prime.

It is a super-2 number, since 2×1222012331² = 2986628274232107122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222012301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084706 + ... + 1085831.

It is an arithmetic number, because the mean of its divisors is an integer number (306045858).

Almost surely, 2^1222012331 is an apocalyptic number.

1222012331 is a deficient number, since it is larger than the sum of its proper divisors (2171101).

1222012331 is an equidigital number, since it uses as much as digits as its factorization.

1222012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171100.

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

The square root of 1222012331 is about 34957.2929586946. The cubic root of 1222012331 is about 1069.1169034675.

Adding to 1222012331 its reverse (1332102221), we get a palindrome (2554114552).

The spelling of 1222012331 in words is "one billion, two hundred twenty-two million, twelve thousand, three hundred thirty-one".