12120212021122 has 4 divisors (see below), whose sum is σ = 18180318031686. Its totient is φ = 6060106010560.

The previous prime is 12120212021089. The next prime is 12120212021123. The reversal of 12120212021122 is 22112021202121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6439611694321 + 5680600326801 = 2537639^2 + 2383401^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12120212021122.

It is not an unprimeable number, because it can be changed into a prime (12120212021123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030053005279 + ... + 3030053005282.

Almost surely, 2^{12120212021122} is an apocalyptic number.

12120212021122 is a deficient number, since it is larger than the sum of its proper divisors (6060106010564).

12120212021122 is an equidigital number, since it uses as much as digits as its factorization.

12120212021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060106010563.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12120212021122 its reverse (22112021202121), we get a palindrome (34232233223243).

The spelling of 12120212021122 in words is "twelve trillion, one hundred twenty billion, two hundred twelve million, twenty-one thousand, one hundred twenty-two".