213113211023 has 2 divisors, whose sum is σ = 213113211024.
Its totient is φ = 213113211022.
The previous prime is 213113211019. The next prime is 213113211037. The reversal of 213113211023 is 320112311312.
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 213113211023 - 22 = 213113211019 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 213113210986 and 213113211004.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (213113211083) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556605511 + 106556605512.
It is an arithmetic number, because the mean of its divisors is an integer number (106556605512).
Almost surely, 2213113211023 is an apocalyptic number.
213113211023 is a deficient number, since it is larger than the sum of its proper divisors (1).
213113211023 is an equidigital number, since it uses as much as digits as its factorization.
213113211023 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 216, while the sum is 20.
Adding to 213113211023 its reverse (320112311312), we get a palindrome (533225522335).
The spelling of 213113211023 in words is "two hundred thirteen billion, one hundred thirteen million, two hundred eleven thousand, twenty-three".