1221123230 has 16 divisors (see below), whose sum is σ = 2198470464. Its totient is φ = 488349600.

The previous prime is 1221123221. The next prime is 1221123257. The reversal of 1221123230 is 323211221.

It is a super-2 number, since 2×1221123230² = 2982283885691265800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221123199 and 1221123208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57899 + ... + 76121.

It is an arithmetic number, because the mean of its divisors is an integer number (137404404).

Almost surely, 2^1221123230 is an apocalyptic number.

1221123230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221123230 is a deficient number, since it is larger than the sum of its proper divisors (977347234).

1221123230 is a wasteful number, since it uses less digits than its factorization.

1221123230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24931.

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

The square root of 1221123230 is about 34944.5736846223. The cubic root of 1221123230 is about 1068.8575543298.

Adding to 1221123230 its reverse (323211221), we get a palindrome (1544334451).

The spelling of 1221123230 in words is "one billion, two hundred twenty-one million, one hundred twenty-three thousand, two hundred thirty".