1220000231 has 2 divisors, whose sum is σ = 1220000232. Its totient is φ = 1220000230.

The previous prime is 1220000191. The next prime is 1220000233. The reversal of 1220000231 is 1320000221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220000231 - 2¹⁸ = 1219738087 is a prime.

It is a super-2 number, since 2×1220000231² = 2976801127280106722, which contains 22 as substring.

Together with 1220000233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220000233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610000115 + 610000116.

It is an arithmetic number, because the mean of its divisors is an integer number (610000116).

Almost surely, 2^1220000231 is an apocalyptic number.

1220000231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220000231 is an equidigital number, since it uses as much as digits as its factorization.

1220000231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1220000231 is about 34928.5016999012. The cubic root of 1220000231 is about 1068.5297975889.

Adding to 1220000231 its reverse (1320000221), we get a palindrome (2540000452).

The spelling of 1220000231 in words is "one billion, two hundred twenty million, two hundred thirty-one", and thus it is an aban number.