12210212020021 has 4 divisors (see below), whose sum is σ = 12210299396352. Its totient is φ = 12210124643692.

The previous prime is 12210212019983. The next prime is 12210212020037. The reversal of 12210212020021 is 12002021201221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12210212020021 - 2⁴³ = 3414118997813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210212019977 and 12210212020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210212020621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43478215 + ... + 43758148.

It is an arithmetic number, because the mean of its divisors is an integer number (3052574849088).

Almost surely, 2^{12210212020021} is an apocalyptic number.

It is an amenable number.

12210212020021 is a deficient number, since it is larger than the sum of its proper divisors (87376331).

12210212020021 is an equidigital number, since it uses as much as digits as its factorization.

12210212020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87376330.

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

Adding to 12210212020021 its reverse (12002021201221), we get a palindrome (24212233221242).

The spelling of 12210212020021 in words is "twelve trillion, two hundred ten billion, two hundred twelve million, twenty thousand, twenty-one".