12202212120021 has 64 divisors (see below), whose sum is σ = 22609095413760. Its totient is φ = 6318814898880.

The previous prime is 12202212120011. The next prime is 12202212120031. The reversal of 12202212120021 is 12002121220221.

It is a happy number.

12202212120021 is a `hidden beast` number, since 1 + 220 + 221 + 2 + 1 + 200 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (12202212120011) and next prime (12202212120031).

It is not a de Polignac number, because 12202212120021 - 2⁶ = 12202212119957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12202212119976 and 12202212120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202212120001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8598481 + ... + 9916566.

It is an arithmetic number, because the mean of its divisors is an integer number (353267115840).

Almost surely, 2^{12202212120021} is an apocalyptic number.

12202212120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12202212120021 is a deficient number, since it is larger than the sum of its proper divisors (10406883293739).

12202212120021 is a wasteful number, since it uses less digits than its factorization.

12202212120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18515391 (or 18515385 counting only the distinct ones).

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

Adding to 12202212120021 its reverse (12002121220221), we get a palindrome (24204333340242).

The spelling of 12202212120021 in words is "twelve trillion, two hundred two billion, two hundred twelve million, one hundred twenty thousand, twenty-one".