20121020302213 has 4 divisors (see below), whose sum is σ = 20121594092460. Its totient is φ = 20120446511968.

The previous prime is 20121020302193. The next prime is 20121020302223. The reversal of 20121020302213 is 31220302012102.

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 19974883832929 + 146136469284 = 4469327^2 + 382278^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121020302213 - 2¹³ = 20121020294021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121020302223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286842520 + ... + 286912657.

It is an arithmetic number, because the mean of its divisors is an integer number (5030398523115).

Almost surely, 2^{20121020302213} is an apocalyptic number.

It is an amenable number.

20121020302213 is a deficient number, since it is larger than the sum of its proper divisors (573790247).

20121020302213 is an equidigital number, since it uses as much as digits as its factorization.

20121020302213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573790246.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20121020302213 its reverse (31220302012102), we get a palindrome (51341322314315).

The spelling of 20121020302213 in words is "twenty trillion, one hundred twenty-one billion, twenty million, three hundred two thousand, two hundred thirteen".