1221846331 has 2 divisors, whose sum is σ = 1221846332. Its totient is φ = 1221846330.

The previous prime is 1221846317. The next prime is 1221846343. The reversal of 1221846331 is 1336481221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221846331 - 2⁷ = 1221846203 is a prime.

It is a super-2 number, since 2×1221846331² = 2985816913156323122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221846293 and 1221846302.

It is not a weakly prime, because it can be changed into another prime (1221846931) 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 as a sum of consecutive naturals, namely, 610923165 + 610923166.

It is an arithmetic number, because the mean of its divisors is an integer number (610923166).

Almost surely, 2^1221846331 is an apocalyptic number.

1221846331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221846331 is an equidigital number, since it uses as much as digits as its factorization.

1221846331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 1221846331 is about 34954.9185523297. The cubic root of 1221846331 is about 1069.0684911238.

The spelling of 1221846331 in words is "one billion, two hundred twenty-one million, eight hundred forty-six thousand, three hundred thirty-one".