1223498221 has 16 divisors (see below), whose sum is σ = 1369082880. Its totient is φ = 1083766320.

The previous prime is 1223498209. The next prime is 1223498231. The reversal of 1223498221 is 1228943221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1223498221 - 2⁷ = 1223498093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223498231) 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 15 ways as a sum of consecutive naturals, for example, 206620 + ... + 212458.

It is an arithmetic number, because the mean of its divisors is an integer number (85567680).

Almost surely, 2^1223498221 is an apocalyptic number.

1223498221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1223498221 is a deficient number, since it is larger than the sum of its proper divisors (145584659).

1223498221 is a wasteful number, since it uses less digits than its factorization.

1223498221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6336.

The product of its digits is 13824, while the sum is 34.

The square root of 1223498221 is about 34978.5394349164. The cubic root of 1223498221 is about 1069.5500542180.

The spelling of 1223498221 in words is "one billion, two hundred twenty-three million, four hundred ninety-eight thousand, two hundred twenty-one".