12210121012213 has 4 divisors (see below), whose sum is σ = 12410286930508. Its totient is φ = 12009955093920.

The previous prime is 12210121012207. The next prime is 12210121012261. The reversal of 12210121012213 is 31221012101221.

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 6998977131364 + 5211143880849 = 2645558^2 + 2282793^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210121012213 - 2¹³ = 12210121004021 is a prime.

It is a super-3 number, since 3×12210121012213³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210121042213) 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, 100082959056 + ... + 100082959177.

It is an arithmetic number, because the mean of its divisors is an integer number (3102571732627).

Almost surely, 2^{12210121012213} is an apocalyptic number.

It is an amenable number.

12210121012213 is a deficient number, since it is larger than the sum of its proper divisors (200165918295).

12210121012213 is an equidigital number, since it uses as much as digits as its factorization.

12210121012213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200165918294.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12210121012213 its reverse (31221012101221), we get a palindrome (43431133113434).

It can be divided in two parts, 1221012101221 and 3, that multiplied together give a palindrome (3663036303663).

The spelling of 12210121012213 in words is "twelve trillion, two hundred ten billion, one hundred twenty-one million, twelve thousand, two hundred thirteen".