12201001121 has 4 divisors (see below), whose sum is σ = 12201669012. Its totient is φ = 12200333232.

The previous prime is 12201001097. The next prime is 12201001123. The reversal of 12201001121 is 12110010221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8771259025 + 3429742096 = 93655^2 + 58564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12201001121 - 2¹⁴ = 12200984737 is a prime.

It is a super-4 number, since 4×12201001121⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12201001123) 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, 305750 + ... + 343343.

It is an arithmetic number, because the mean of its divisors is an integer number (3050417253).

Almost surely, 2^12201001121 is an apocalyptic number.

It is an amenable number.

12201001121 is a deficient number, since it is larger than the sum of its proper divisors (667891).

12201001121 is an equidigital number, since it uses as much as digits as its factorization.

12201001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667890.

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

Adding to 12201001121 its reverse (12110010221), we get a palindrome (24311011342).

It can be divided in two parts, 1220100 and 1121, that added together give a palindrome (1221221).

The spelling of 12201001121 in words is "twelve billion, two hundred one million, one thousand, one hundred twenty-one".