213100031101 has 4 divisors (see below), whose sum is σ = 213426371772. Its totient is φ = 212773690432.

The previous prime is 213100030967. The next prime is 213100031107. The reversal of 213100031101 is 101130001312.

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 23761914201 + 189338116900 = 154149^2 + 435130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213100031101 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 (213100031107) 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, 163169356 + ... + 163170661.

It is an arithmetic number, because the mean of its divisors is an integer number (53356592943).

Almost surely, 2^213100031101 is an apocalyptic number.

It is an amenable number.

213100031101 is a deficient number, since it is larger than the sum of its proper divisors (326340671).

213100031101 is an equidigital number, since it uses as much as digits as its factorization.

213100031101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326340670.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 213100031101 its reverse (101130001312), we get a palindrome (314230032413).

The spelling of 213100031101 in words is "two hundred thirteen billion, one hundred million, thirty-one thousand, one hundred one".