12121121121122 has 16 divisors (see below), whose sum is σ = 19753549333560. Its totient is φ = 5544855950592.

The previous prime is 12121121121079. The next prime is 12121121121133. The reversal of 12121121121122 is 22112112112121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1653819148081 + 10467301973041 = 1286009^2 + 3235321^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12121121121094 and 12121121121103.

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, 2062815497 + ... + 2062821372.

Almost surely, 2^{12121121121122} is an apocalyptic number.

12121121121122 is a deficient number, since it is larger than the sum of its proper divisors (7632428212438).

12121121121122 is a wasteful number, since it uses less digits than its factorization.

12121121121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125636997.

The product of its digits is 64, while the sum is 20.

Adding to 12121121121122 its reverse (22112112112121), we get a palindrome (34233233233243).

Subtracting 12121121121122 from its reverse (22112112112121), we obtain a palindrome (9990990990999).

The spelling of 12121121121122 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".