1213123229 has 8 divisors (see below), whose sum is σ = 1284356640. Its totient is φ = 1142628336.

The previous prime is 1213123207. The next prime is 1213123259. The reversal of 1213123229 is 9223213121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213123229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213123198 and 1213123207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213123259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181247 + ... + 187820.

It is an arithmetic number, because the mean of its divisors is an integer number (160544580).

Almost surely, 2^1213123229 is an apocalyptic number.

1213123229 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1213123229 is a deficient number, since it is larger than the sum of its proper divisors (71233411).

1213123229 is a wasteful number, since it uses less digits than its factorization.

1213123229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369259.

The product of its digits is 1296, while the sum is 26.

The square root of 1213123229 is about 34829.9185902006. The cubic root of 1213123229 is about 1066.5182864675.

The spelling of 1213123229 in words is "one billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred twenty-nine".