211231210004 has 12 divisors (see below), whose sum is σ = 371569927764. Its totient is φ = 105068373504.

The previous prime is 211231209991. The next prime is 211231210039. The reversal of 211231210004 is 400012132112.

It can be written as a sum of positive squares in 2 ways, for example, as 74960964100 + 136270245904 = 273790^2 + 369148^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136807007 + ... + 136808550.

It is an arithmetic number, because the mean of its divisors is an integer number (30964160647).

Almost surely, 2^211231210004 is an apocalyptic number.

It is an amenable number.

211231210004 is a deficient number, since it is larger than the sum of its proper divisors (160338717760).

211231210004 is a wasteful number, since it uses less digits than its factorization.

211231210004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273615754 (or 273615752 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211231210004 its reverse (400012132112), we get a palindrome (611243342116).

The spelling of 211231210004 in words is "two hundred eleven billion, two hundred thirty-one million, two hundred ten thousand, four".