213111222113 has 4 divisors (see below), whose sum is σ = 214789263360. Its totient is φ = 211433180868.

The previous prime is 213111222101. The next prime is 213111222161. The reversal of 213111222113 is 311222111312.

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 213111222113 - 2¹⁸ = 213110959969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213111222013) 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, 839020433 + ... + 839020686.

It is an arithmetic number, because the mean of its divisors is an integer number (53697315840).

Almost surely, 2^213111222113 is an apocalyptic number.

It is an amenable number.

213111222113 is a deficient number, since it is larger than the sum of its proper divisors (1678041247).

213111222113 is a wasteful number, since it uses less digits than its factorization.

213111222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678041246.

The product of its digits is 144, while the sum is 20.

Adding to 213111222113 its reverse (311222111312), we get a palindrome (524333333425).

The spelling of 213111222113 in words is "two hundred thirteen billion, one hundred eleven million, two hundred twenty-two thousand, one hundred thirteen".