12220210210121 has 4 divisors (see below), whose sum is σ = 12939046104852. Its totient is φ = 11501374315392.

The previous prime is 12220210210111. The next prime is 12220210210133. The reversal of 12220210210121 is 12101201202221.

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 11194618538896 + 1025591671225 = 3345836^2 + 1012715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220210210121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 718835894713 = 12220210210121 / (1 + 2 + 2 + 2 + 0 + 2 + 1 + 0 + 2 + 1 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12220210210121.

It is not an unprimeable number, because it can be changed into a prime (12220210210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359417947340 + ... + 359417947373.

It is an arithmetic number, because the mean of its divisors is an integer number (3234761526213).

Almost surely, 2^{12220210210121} is an apocalyptic number.

It is an amenable number.

12220210210121 is a deficient number, since it is larger than the sum of its proper divisors (718835894731).

12220210210121 is an equidigital number, since it uses as much as digits as its factorization.

12220210210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718835894730.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12220210210121 its reverse (12101201202221), we get a palindrome (24321411412342).

The spelling of 12220210210121 in words is "twelve trillion, two hundred twenty billion, two hundred ten million, two hundred ten thousand, one hundred twenty-one".