12210110021 has 6 divisors (see below), whose sum is σ = 12500671590. Its totient is φ = 11926152168.

The previous prime is 12210109993. The next prime is 12210110047. The reversal of 12210110021 is 12001101221.

It can be written as a sum of positive squares in only one way, i.e., 9194892100 + 3015217921 = 95890^2 + 54911^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12210110021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210109984 and 12210110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210110621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3299966 + ... + 3303663.

It is an arithmetic number, because the mean of its divisors is an integer number (2083445265).

Almost surely, 2^12210110021 is an apocalyptic number.

It is an amenable number.

12210110021 is a deficient number, since it is larger than the sum of its proper divisors (290561569).

12210110021 is an frugal number, since it uses more digits than its factorization.

12210110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6603715 (or 6603672 counting only the distinct ones).

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

Adding to 12210110021 its reverse (12001101221), we get a palindrome (24211211242).

The spelling of 12210110021 in words is "twelve billion, two hundred ten million, one hundred ten thousand, twenty-one".