1211212211122 has 8 divisors (see below), whose sum is σ = 1835548402716. Its totient is φ = 599362743552.

The previous prime is 1211212211101. The next prime is 1211212211177. The reversal of 1211212211122 is 2211122121121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1208330776081 + 2881435041 = 1099241^2 + 53679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 1211212211122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3121680763 + ... + 3121681150.

Almost surely, 2^{1211212211122} is an apocalyptic number.

1211212211122 is a deficient number, since it is larger than the sum of its proper divisors (624336191594).

1211212211122 is an equidigital number, since it uses as much as digits as its factorization.

1211212211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6243362012.

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

Adding to 1211212211122 its reverse (2211122121121), we get a palindrome (3422334332243).

Subtracting 1211212211122 from its reverse (2211122121121), we obtain a palindrome (999909909999).

The spelling of 1211212211122 in words is "one trillion, two hundred eleven billion, two hundred twelve million, two hundred eleven thousand, one hundred twenty-two".