213101021423 has 4 divisors (see below), whose sum is σ = 222366283248. Its totient is φ = 203835759600.

The previous prime is 213101021369. The next prime is 213101021431. The reversal of 213101021423 is 324120101312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213101021423 - 2⁸ = 213101021167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213101021395 and 213101021404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213101027423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4632630878 + ... + 4632630923.

It is an arithmetic number, because the mean of its divisors is an integer number (55591570812).

Almost surely, 2^213101021423 is an apocalyptic number.

213101021423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213101021423 is a deficient number, since it is larger than the sum of its proper divisors (9265261825).

213101021423 is an equidigital number, since it uses as much as digits as its factorization.

213101021423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9265261824.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 213101021423 its reverse (324120101312), we get a palindrome (537221122735).

The spelling of 213101021423 in words is "two hundred thirteen billion, one hundred one million, twenty-one thousand, four hundred twenty-three".