12210101021 has 4 divisors (see below), whose sum is σ = 12214435200. Its totient is φ = 12205766844.

The previous prime is 12210101009. The next prime is 12210101027. The reversal of 12210101021 is 12010101221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12010101221 = 211 ⋅56919911.

It is a cyclic number.

It is not a de Polignac number, because 12210101021 - 2¹⁴ = 12210084637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210100993 and 12210101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210101027) 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, 2162861 + ... + 2168498.

It is an arithmetic number, because the mean of its divisors is an integer number (3053608800).

Almost surely, 2^12210101021 is an apocalyptic number.

It is an amenable number.

12210101021 is a deficient number, since it is larger than the sum of its proper divisors (4334179).

12210101021 is an equidigital number, since it uses as much as digits as its factorization.

12210101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334178.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12210101021 its reverse (12010101221), we get a palindrome (24220202242).

The spelling of 12210101021 in words is "twelve billion, two hundred ten million, one hundred one thousand, twenty-one".