12210012002021 has 8 divisors (see below), whose sum is σ = 12536703604824. Its totient is φ = 11884695943680.

The previous prime is 12210012001991. The next prime is 12210012002033. The reversal of 12210012002021 is 12020021001221.

It can be written as a sum of positive squares in 4 ways, for example, as 1891532608900 + 10318479393121 = 1375330^2 + 3212239^2 .

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 12210012002021 - 2¹⁰ = 12210012000997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12210012001987 and 12210012002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210002002021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343868126 + ... + 343903631.

It is an arithmetic number, because the mean of its divisors is an integer number (1567087950603).

Almost surely, 2^{12210012002021} is an apocalyptic number.

It is an amenable number.

12210012002021 is a deficient number, since it is larger than the sum of its proper divisors (326691602803).

12210012002021 is an equidigital number, since it uses as much as digits as its factorization.

12210012002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687772231.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12210012002021 its reverse (12020021001221), we get a palindrome (24230033003242).

The spelling of 12210012002021 in words is "twelve trillion, two hundred ten billion, twelve million, two thousand, twenty-one".