213530031101 has 4 divisors (see below), whose sum is σ = 213532182912. Its totient is φ = 213527879292.

The previous prime is 213530031073. The next prime is 213530031103. The reversal of 213530031101 is 101130035312.

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-213530031101 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 (213530031103) 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, 919475 + ... + 1128048.

It is an arithmetic number, because the mean of its divisors is an integer number (53383045728).

Almost surely, 2^213530031101 is an apocalyptic number.

It is an amenable number.

213530031101 is a deficient number, since it is larger than the sum of its proper divisors (2151811).

213530031101 is a wasteful number, since it uses less digits than its factorization.

213530031101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151810.

The product of its (nonzero) digits is 270, while the sum is 20.

Adding to 213530031101 its reverse (101130035312), we get a palindrome (314660066413).

The spelling of 213530031101 in words is "two hundred thirteen billion, five hundred thirty million, thirty-one thousand, one hundred one".