1212121121122 has 16 divisors (see below), whose sum is σ = 1841124673080. Its totient is φ = 598450851072.

The previous prime is 1212121121059. The next prime is 1212121121129. The reversal of 1212121121122 is 2211211212121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1212115123521 + 5997601 = 1100961^2 + 2449^2 .

It is a super-2 number, since 2×1212121121122² (a number of 25 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1212121121122.

It is not an unprimeable number, because it can be changed into a prime (1212121121129) 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, 9424503 + ... + 9552250.

Almost surely, 2^{1212121121122} is an apocalyptic number.

1212121121122 is a deficient number, since it is larger than the sum of its proper divisors (629003551958).

1212121121122 is a wasteful number, since it uses less digits than its factorization.

1212121121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18977157.

The product of its digits is 64, while the sum is 19.

Adding to 1212121121122 its reverse (2211211212121), we get a palindrome (3423332333243).

Subtracting 1212121121122 from its reverse (2211211212121), we obtain a palindrome (999090090999).

The spelling of 1212121121122 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".