12102121201 has 4 divisors (see below), whose sum is σ = 12102922404. Its totient is φ = 12101320000.

The previous prime is 12102121189. The next prime is 12102121253. The reversal of 12102121201 is 10212120121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10212120121 = 7 ⋅1458874303.

It can be written as a sum of positive squares in 2 ways, for example, as 7402881600 + 4699239601 = 86040^2 + 68551^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102121201 - 2¹⁵ = 12102088433 is a prime.

It is a super-2 number, since 2×12102121201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102121261) 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, 377500 + ... + 408301.

It is an arithmetic number, because the mean of its divisors is an integer number (3025730601).

Almost surely, 2^12102121201 is an apocalyptic number.

It is an amenable number.

12102121201 is a deficient number, since it is larger than the sum of its proper divisors (801203).

12102121201 is an equidigital number, since it uses as much as digits as its factorization.

12102121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801202.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12102121201 its reverse (10212120121), we get a palindrome (22314241322).

The spelling of 12102121201 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, two hundred one".