12021021021122 has 4 divisors (see below), whose sum is σ = 18031531531686. Its totient is φ = 6010510510560.

The previous prime is 12021021021109. The next prime is 12021021021127. The reversal of 12021021021122 is 22112012012021.

12021021021122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 11925149664961 + 95871356161 = 3453281^2 + 309631^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12021021021122.

It is not an unprimeable number, because it can be changed into a prime (12021021021127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005255255279 + ... + 3005255255282.

Almost surely, 2^{12021021021122} is an apocalyptic number.

12021021021122 is a deficient number, since it is larger than the sum of its proper divisors (6010510510564).

12021021021122 is an equidigital number, since it uses as much as digits as its factorization.

12021021021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010510510563.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021021021122 its reverse (22112012012021), we get a palindrome (34133033033143).

The spelling of 12021021021122 in words is "twelve trillion, twenty-one billion, twenty-one million, twenty-one thousand, one hundred twenty-two".