1221230200 has 24 divisors (see below), whose sum is σ = 2839360680. Its totient is φ = 488492000.

The previous prime is 1221230189. The next prime is 1221230221. The reversal of 1221230200 is 20321221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3052876 + ... + 3053275.

It is an arithmetic number, because the mean of its divisors is an integer number (118306695).

Almost surely, 2^1221230200 is an apocalyptic number.

1221230200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221230200 is an abundant number, since it is smaller than the sum of its proper divisors (1618130480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221230200 is a wasteful number, since it uses less digits than its factorization.

1221230200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106167 (or 6106158 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1221230200 is about 34946.1042177808. The cubic root of 1221230200 is about 1068.8887639438. Note that the first 3 decimals are identical.

Adding to 1221230200 its reverse (20321221), we get a palindrome (1241551421).

The spelling of 1221230200 in words is "one billion, two hundred twenty-one million, two hundred thirty thousand, two hundred".