1211242122 has 12 divisors (see below), whose sum is σ = 2624357970. Its totient is φ = 403747368.

The previous prime is 1211242111. The next prime is 1211242127. The reversal of 1211242122 is 2212421121.

It can be written as a sum of positive squares in only one way, i.e., 930311001 + 280931121 = 30501^2 + 16761^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67291229 = 1211242122 / (1 + 2 + 1 + 1 + 2 + 4 + 2 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 1211242095 and 1211242104.

It is not an unprimeable number, because it can be changed into a prime (1211242127) 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 5 ways as a sum of consecutive naturals, for example, 33645597 + ... + 33645632.

Almost surely, 2^1211242122 is an apocalyptic number.

1211242122 is an abundant number, since it is smaller than the sum of its proper divisors (1413115848).

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

1211242122 is a wasteful number, since it uses less digits than its factorization.

1211242122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67291237 (or 67291234 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 1211242122 is about 34802.9039305630. The cubic root of 1211242122 is about 1065.9667423656.

Adding to 1211242122 its reverse (2212421121), we get a palindrome (3423663243).

The spelling of 1211242122 in words is "one billion, two hundred eleven million, two hundred forty-two thousand, one hundred twenty-two".