12121001201 has 4 divisors (see below), whose sum is σ = 12127146612. Its totient is φ = 12114855792.

The previous prime is 12121001183. The next prime is 12121001203. The reversal of 12121001201 is 10210012121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10210012121 = 19 ⋅537369059.

It can be written as a sum of positive squares in 2 ways, for example, as 761704801 + 11359296400 = 27599^2 + 106580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121001201 is a prime.

It is a super-2 number, since 2×12121001201² (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 (12121001203) 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, 3069746 + ... + 3073691.

It is an arithmetic number, because the mean of its divisors is an integer number (3031786653).

Almost surely, 2^12121001201 is an apocalyptic number.

It is an amenable number.

12121001201 is a deficient number, since it is larger than the sum of its proper divisors (6145411).

12121001201 is an equidigital number, since it uses as much as digits as its factorization.

12121001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145410.

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

Adding to 12121001201 its reverse (10210012121), we get a palindrome (22331013322).

The spelling of 12121001201 in words is "twelve billion, one hundred twenty-one million, one thousand, two hundred one".