1212222123 has 18 divisors (see below), whose sum is σ = 2036863764. Its totient is φ = 692698104.

The previous prime is 1212222091. The next prime is 1212222133. The reversal of 1212222123 is 3212222121.

It is not a de Polignac number, because 1212222123 - 2⁵ = 1212222091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212222096 and 1212222105.

It is not an unprimeable number, because it can be changed into a prime (1212222133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1373961 + ... + 1374842.

It is an arithmetic number, because the mean of its divisors is an integer number (113159098).

Almost surely, 2^1212222123 is an apocalyptic number.

1212222123 is a deficient number, since it is larger than the sum of its proper divisors (824641641).

1212222123 is a wasteful number, since it uses less digits than its factorization.

1212222123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748823 (or 2748813 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1212222123 is about 34816.9803831406. The cubic root of 1212222123 is about 1066.2541516963.

Adding to 1212222123 its reverse (3212222121), we get a palindrome (4424444244).

The spelling of 1212222123 in words is "one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-three".