12212200021021 has 24 divisors (see below), whose sum is σ = 16521018225152. Its totient is φ = 8784000007200.

The previous prime is 12212200021019. The next prime is 12212200021097. The reversal of 12212200021021 is 12012000221221.

It is a happy number.

It is not a de Polignac number, because 12212200021021 - 2¹ = 12212200021019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212200020986 and 12212200021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212200021001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 554534445 + ... + 554556466.

Almost surely, 2^{12212200021021} is an apocalyptic number.

12212200021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212200021021 is a deficient number, since it is larger than the sum of its proper divisors (4308818204131).

12212200021021 is a wasteful number, since it uses less digits than its factorization.

12212200021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109090953 (or 1109090942 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12212200021021 its reverse (12012000221221), we get a palindrome (24224200242242).

The spelling of 12212200021021 in words is "twelve trillion, two hundred twelve billion, two hundred million, twenty-one thousand, twenty-one".