12210000020021 has 8 divisors (see below), whose sum is σ = 12631076236800. Its totient is φ = 11788926585520.

The previous prime is 12210000019999. The next prime is 12210000020027. The reversal of 12210000020021 is 12002000001221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12210000020021 - 2¹⁴ = 12210000003637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210000019984 and 12210000020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210000020027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12432860 + ... + 13378938.

It is an arithmetic number, because the mean of its divisors is an integer number (1578884529600).

Almost surely, 2^{12210000020021} is an apocalyptic number.

It is an amenable number.

12210000020021 is a deficient number, since it is larger than the sum of its proper divisors (421076216779).

12210000020021 is an equidigital number, since it uses as much as digits as its factorization.

12210000020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391139.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12210000020021 its reverse (12002000001221), we get a palindrome (24212000021242).

The spelling of 12210000020021 in words is "twelve trillion, two hundred ten billion, twenty thousand, twenty-one".