1213022200 has 48 divisors (see below), whose sum is σ = 3037227480. Its totient is φ = 447884160.

The previous prime is 1213022147. The next prime is 1213022257. The reversal of 1213022200 is 22203121.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 230674 + ... + 235873.

Almost surely, 2^1213022200 is an apocalyptic number.

1213022200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213022200 is an abundant number, since it is smaller than the sum of its proper divisors (1824205280).

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

1213022200 is a wasteful number, since it uses less digits than its factorization.

1213022200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466576 (or 466567 counting only the distinct ones).

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

The square root of 1213022200 is about 34828.4682407941. The cubic root of 1213022200 is about 1066.4886790694.

Adding to 1213022200 its reverse (22203121), we get a palindrome (1235225321).

The spelling of 1213022200 in words is "one billion, two hundred thirteen million, twenty-two thousand, two hundred".