12210102021221 has 8 divisors (see below), whose sum is σ = 13150089324120. Its totient is φ = 11270221673472.

The previous prime is 12210102021167. The next prime is 12210102021251. The reversal of 12210102021221 is 12212020101221.

12210102021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1953705062500 + 10256396958721 = 1397750^2 + 3202561^2 .

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 12210102021221 - 2²² = 12210097826917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12210102021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210102021251) 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, 26501600 + ... + 26958393.

It is an arithmetic number, because the mean of its divisors is an integer number (1643761165515).

Almost surely, 2^{12210102021221} is an apocalyptic number.

It is an amenable number.

12210102021221 is a deficient number, since it is larger than the sum of its proper divisors (939987302899).

12210102021221 is a wasteful number, since it uses less digits than its factorization.

12210102021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53477575.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12210102021221 its reverse (12212020101221), we get a palindrome (24422122122442).

The spelling of 12210102021221 in words is "twelve trillion, two hundred ten billion, one hundred two million, twenty-one thousand, two hundred twenty-one".