213431312101 has 4 divisors (see below), whose sum is σ = 243921499552. Its totient is φ = 182941124652.

The previous prime is 213431312009. The next prime is 213431312111. The reversal of 213431312101 is 101213134312.

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 213431312101 - 2¹³ = 213431303909 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 (213431312111) 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, 15245093715 + ... + 15245093728.

It is an arithmetic number, because the mean of its divisors is an integer number (60980374888).

Almost surely, 2^213431312101 is an apocalyptic number.

It is an amenable number.

213431312101 is a deficient number, since it is larger than the sum of its proper divisors (30490187451).

213431312101 is an equidigital number, since it uses as much as digits as its factorization.

213431312101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30490187450.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 213431312101 its reverse (101213134312), we get a palindrome (314644446413).

The spelling of 213431312101 in words is "two hundred thirteen billion, four hundred thirty-one million, three hundred twelve thousand, one hundred one".