1213123030 has 16 divisors (see below), whose sum is σ = 2495567520. Its totient is φ = 415927872.

The previous prime is 1213123027. The next prime is 1213123049. The reversal of 1213123030 is 303213121.

It is a junction number, because it is equal to n+sod(n) for n = 1213122995 and 1213123013.

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, 8665095 + ... + 8665234.

It is an arithmetic number, because the mean of its divisors is an integer number (155972970).

Almost surely, 2^1213123030 is an apocalyptic number.

1213123030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213123030 is an abundant number, since it is smaller than the sum of its proper divisors (1282444490).

1213123030 is a wasteful number, since it uses less digits than its factorization.

1213123030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17330343.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1213123030 is about 34829.9157334611. The cubic root of 1213123030 is about 1066.5182281505.

Adding to 1213123030 its reverse (303213121), we get a palindrome (1516336151).

Subtracting from 1213123030 its reverse (303213121), we obtain a palindrome (909909909).

The spelling of 1213123030 in words is "one billion, two hundred thirteen million, one hundred twenty-three thousand, thirty".