1212213123 has 12 divisors (see below), whose sum is σ = 1910154168. Its totient is φ = 734674560.

The previous prime is 1212213097. The next prime is 1212213133. The reversal of 1212213123 is 3213122121.

It is not a de Polignac number, because 1212213123 - 2²⁹ = 675342211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212213096 and 1212213105.

It is not an unprimeable number, because it can be changed into a prime (1212213133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6122190 + ... + 6122387.

It is an arithmetic number, because the mean of its divisors is an integer number (159179514).

Almost surely, 2^1212213123 is an apocalyptic number.

1212213123 is a deficient number, since it is larger than the sum of its proper divisors (697941045).

1212213123 is a wasteful number, since it uses less digits than its factorization.

1212213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12244594 (or 12244591 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1212213123 is about 34816.8511356211. The cubic root of 1212213123 is about 1066.2515129304.

Adding to 1212213123 its reverse (3213122121), we get a palindrome (4425335244).

The spelling of 1212213123 in words is "one billion, two hundred twelve million, two hundred thirteen thousand, one hundred twenty-three".