211212320423 has 16 divisors (see below), whose sum is σ = 239488929120. Its totient is φ = 184659181056.

The previous prime is 211212320381. The next prime is 211212320443. The reversal of 211212320423 is 324023212112.

It is a cyclic number.

It is not a de Polignac number, because 211212320423 - 2¹² = 211212316327 is a prime.

It is a super-2 number, since 2×211212320423² (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 (211212320443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 940211 + ... + 1142987.

It is an arithmetic number, because the mean of its divisors is an integer number (14968058070).

Almost surely, 2^211212320423 is an apocalyptic number.

211212320423 is a deficient number, since it is larger than the sum of its proper divisors (28276608697).

211212320423 is a wasteful number, since it uses less digits than its factorization.

211212320423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207026.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 211212320423 its reverse (324023212112), we get a palindrome (535235532535).

The spelling of 211212320423 in words is "two hundred eleven billion, two hundred twelve million, three hundred twenty thousand, four hundred twenty-three".