12121210202 has 4 divisors (see below), whose sum is σ = 18181815306. Its totient is φ = 6060605100.

The previous prime is 12121210177. The next prime is 12121210207. The reversal of 12121210202 is 20201212121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20201212121 = 569 ⋅35503009.

It can be written as a sum of positive squares in only one way, i.e., 12032115481 + 89094721 = 109691^2 + 9439^2 .

It is a super-2 number, since 2×12121210202² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12121210207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030302549 + ... + 3030302552.

Almost surely, 2^12121210202 is an apocalyptic number.

12121210202 is a deficient number, since it is larger than the sum of its proper divisors (6060605104).

12121210202 is an equidigital number, since it uses as much as digits as its factorization.

12121210202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060605103.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12121210202 its reverse (20201212121), we get a palindrome (32322422323).

The spelling of 12121210202 in words is "twelve billion, one hundred twenty-one million, two hundred ten thousand, two hundred two".