211211330423 has 4 divisors (see below), whose sum is σ = 213261925968. Its totient is φ = 209160734880.

The previous prime is 211211330417. The next prime is 211211330431. The reversal of 211211330423 is 324033112112.

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 211211330423 - 2⁸ = 211211330167 is a prime.

It is a super-2 number, since 2×211211330423² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211330443) 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, 1025297618 + ... + 1025297823.

It is an arithmetic number, because the mean of its divisors is an integer number (53315481492).

Almost surely, 2^211211330423 is an apocalyptic number.

211211330423 is a deficient number, since it is larger than the sum of its proper divisors (2050595545).

211211330423 is a wasteful number, since it uses less digits than its factorization.

211211330423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050595544.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 211211330423 its reverse (324033112112), we get a palindrome (535244442535).

The spelling of 211211330423 in words is "two hundred eleven billion, two hundred eleven million, three hundred thirty thousand, four hundred twenty-three".