12211121021146 has 24 divisors (see below), whose sum is σ = 19458159301116. Its totient is φ = 5746218992640.

The previous prime is 12211121021119. The next prime is 12211121021147. The reversal of 12211121021146 is 64112012111221.

It can be written as a sum of positive squares in 6 ways, for example, as 7878749361921 + 4332371659225 = 2806911^2 + 2081435^2 .

It is a super-2 number, since 2×12211121021146² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12211121021146.

It is not an unprimeable number, because it can be changed into a prime (12211121021147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17881666 + ... + 18551986.

Almost surely, 2^{12211121021146} is an apocalyptic number.

12211121021146 is a deficient number, since it is larger than the sum of its proper divisors (7247038279970).

12211121021146 is a wasteful number, since it uses less digits than its factorization.

12211121021146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701874 (or 701857 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

Adding to 12211121021146 its reverse (64112012111221), we get a palindrome (76323133132367).

The spelling of 12211121021146 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, twenty-one thousand, one hundred forty-six".