213020121113 has 4 divisors (see below), whose sum is σ = 216512254308. Its totient is φ = 209527987920.

The previous prime is 213020121043. The next prime is 213020121121. The reversal of 213020121113 is 311121020312.

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 76890853264 + 136129267849 = 277292^2 + 368957^2 .

It is a cyclic number.

It is not a de Polignac number, because 213020121113 - 2¹² = 213020117017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213020121091 and 213020121100.

It is not an unprimeable number, because it can be changed into a prime (213020121173) 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, 1746066506 + ... + 1746066627.

It is an arithmetic number, because the mean of its divisors is an integer number (54128063577).

Almost surely, 2^213020121113 is an apocalyptic number.

It is an amenable number.

213020121113 is a deficient number, since it is larger than the sum of its proper divisors (3492133195).

213020121113 is an equidigital number, since it uses as much as digits as its factorization.

213020121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492133194.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 213020121113 its reverse (311121020312), we get a palindrome (524141141425).

The spelling of 213020121113 in words is "two hundred thirteen billion, twenty million, one hundred twenty-one thousand, one hundred thirteen".