12121420210202 has 4 divisors (see below), whose sum is σ = 18182130315306. Its totient is φ = 6060710105100.

The previous prime is 12121420210201. The next prime is 12121420210213. The reversal of 12121420210202 is 20201202412121.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 6494082625801 + 5627337584401 = 2548349^2 + 2372201^2 .

It is not an unprimeable number, because it can be changed into a prime (12121420210201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030355052549 + ... + 3030355052552.

Almost surely, 2^{12121420210202} is an apocalyptic number.

12121420210202 is a deficient number, since it is larger than the sum of its proper divisors (6060710105104).

12121420210202 is an equidigital number, since it uses as much as digits as its factorization.

12121420210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060710105103.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12121420210202 its reverse (20201202412121), we get a palindrome (32322622622323).

The spelling of 12121420210202 in words is "twelve trillion, one hundred twenty-one billion, four hundred twenty million, two hundred ten thousand, two hundred two".