2221022121012 has 24 divisors (see below), whose sum is σ = 5758205499200. Its totient is φ = 740340706968.

The previous prime is 2221022121007. The next prime is 2221022121083. The reversal of 2221022121012 is 2101212201222.

It is a happy number.

2221022121012 is a `hidden beast` number, since 2 + 221 + 0 + 221 + 210 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10282509712 + ... + 10282509927.

Almost surely, 2^{2221022121012} is an apocalyptic number.

It is an amenable number.

2221022121012 is an abundant number, since it is smaller than the sum of its proper divisors (3537183378188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221022121012 is a wasteful number, since it uses less digits than its factorization.

2221022121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20565019652 (or 20565019644 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2221022121012 its reverse (2101212201222), we get a palindrome (4322234322234).

The spelling of 2221022121012 in words is "two trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty-one thousand, twelve".