12202121321 has 8 divisors (see below), whose sum is σ = 13144490184. Its totient is φ = 11260287360.

The previous prime is 12202121317. The next prime is 12202121363. The reversal of 12202121321 is 12312120221.

It can be written as a sum of positive squares in 4 ways, for example, as 973752025 + 11228369296 = 31205^2 + 105964^2 .

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 12202121321 - 2² = 12202121317 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 12202121321.

It is not an unprimeable number, because it can be changed into a prime (12202121311) 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, 85700 + ... + 178181.

It is an arithmetic number, because the mean of its divisors is an integer number (1643061273).

Almost surely, 2^12202121321 is an apocalyptic number.

It is an amenable number.

12202121321 is a deficient number, since it is larger than the sum of its proper divisors (942368863).

12202121321 is a wasteful number, since it uses less digits than its factorization.

12202121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267451.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12202121321 its reverse (12312120221), we get a palindrome (24514241542).

The spelling of 12202121321 in words is "twelve billion, two hundred two million, one hundred twenty-one thousand, three hundred twenty-one".