213131210322101 has 4 divisors (see below), whose sum is σ = 220006410655104. Its totient is φ = 206256009989100.

The previous prime is 213131210322061. The next prime is 213131210322131. The reversal of 213131210322101 is 101223012131312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213131210322101 - 2¹⁰ = 213131210321077 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 (213131210322131) 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, 3437600166455 + ... + 3437600166516.

It is an arithmetic number, because the mean of its divisors is an integer number (55001602663776).

Almost surely, 2^{213131210322101} is an apocalyptic number.

It is an amenable number.

213131210322101 is a deficient number, since it is larger than the sum of its proper divisors (6875200333003).

213131210322101 is an equidigital number, since it uses as much as digits as its factorization.

213131210322101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6875200333002.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 213131210322101 its reverse (101223012131312), we get a palindrome (314354222453413).

The spelling of 213131210322101 in words is "two hundred thirteen trillion, one hundred thirty-one billion, two hundred ten million, three hundred twenty-two thousand, one hundred one".