213122054213 has 4 divisors (see below), whose sum is σ = 216734292480. Its totient is φ = 209509815948.

The previous prime is 213122054207. The next prime is 213122054227. The reversal of 213122054213 is 312450221312.

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 a de Polignac number, because none of the positive numbers 2^k-213122054213 is a prime.

It is a super-2 number, since 2×213122054213² (a number of 23 digits) contains 22 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 (213122054263) 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, 1806119045 + ... + 1806119162.

It is an arithmetic number, because the mean of its divisors is an integer number (54183573120).

Almost surely, 2^213122054213 is an apocalyptic number.

It is an amenable number.

213122054213 is a deficient number, since it is larger than the sum of its proper divisors (3612238267).

213122054213 is an equidigital number, since it uses as much as digits as its factorization.

213122054213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612238266.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 213122054213 its reverse (312450221312), we get a palindrome (525572275525).

The spelling of 213122054213 in words is "two hundred thirteen billion, one hundred twenty-two million, fifty-four thousand, two hundred thirteen".