211423043004 has 12 divisors (see below), whose sum is σ = 493320433704. Its totient is φ = 70474347664.

The previous prime is 211423043003. The next prime is 211423043017. The reversal of 211423043004 is 400340324112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×211423043004² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211423043003) 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, 8809293447 + ... + 8809293470.

It is an arithmetic number, because the mean of its divisors is an integer number (41110036142).

Almost surely, 2^211423043004 is an apocalyptic number.

It is an amenable number.

211423043004 is an abundant number, since it is smaller than the sum of its proper divisors (281897390700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211423043004 is a wasteful number, since it uses less digits than its factorization.

211423043004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17618586924 (or 17618586922 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 211423043004 its reverse (400340324112), we get a palindrome (611763367116).

The spelling of 211423043004 in words is "two hundred eleven billion, four hundred twenty-three million, forty-three thousand, four".